I wasn't doing anything special. I was just going to merge two segments but did not even manage to select both of them on the left side. I found the log. I believe the crash happened at 10.25, and then I restarted Studio at 10.34, and at 10.25 there is a series of entries about something not being found/not existing. Could it be it?

I pasted a bit of the log here (if it does not help, at least I know where to look next time):

INFO [2018-08-03 10:25:05,201] Sdl.MultiTerm.Client.TerminologyProvider.MultiTermTermbase - Connected to ENGPOLTERM as user 1
INFO [2018-08-03 10:25:05,217] Sdl.TranslationStudio.Editor.Terminology.ProjectTermbasesLoader - Initalize termbases end. The number of calls to the server = 0
INFO [2018-08-03 10:25:05,217] Sdl.TranslationStudio.Editor.Terminology.ProjectTermbasesLoader - GetTermbases, initialization event fired for SATISLOH_001-169 .docx.sdlxliff
INFO [2018-08-03 10:25:05,217] Sdl.TranslationStudio.Editor.Terminology.ProjectTermbasesLoader - GetTermbases end initialization for SATISLOH_001-169 .docx.sdlxliff
INFO [2018-08-03 10:25:06,074] ActionService - Start#Id=59b7e842-681e-4e7a-8adf-ed9e79988e34#Name=ShowWhitespaceCharactersAction#ProcessName=SDLTradosStudio#PhysicalMemorySize=398135296#VirtualMemorySize=328183808#ThreadCount=40#HandleCount=1786#GdiHandleCount=1354#UserHandleCount=753#TotalProcessorTime=00:00:26.2031250
INFO [2018-08-03 10:25:06,074] ActionService - Finish#Id=59b7e842-681e-4e7a-8adf-ed9e79988e34#Name=ShowWhitespaceCharactersAction#ProcessName=SDLTradosStudio#PhysicalMemorySize=398155776#VirtualMemorySize=328183808#ThreadCount=40#HandleCount=1787#GdiHandleCount=1355#UserHandleCount=753#TotalProcessorTime=00:00:26.2031250
WARN [2018-08-03 10:25:06,585] CommandBarExtensionRegistry - Command bar with path 'ProjectsView_ProjectsListViewPart_ContextMenu' does not exist within parent command bar 'window'.
WARN [2018-08-03 10:25:06,585] CommandBarExtensionRegistry - Command bar with path 'help' does not exist within parent command bar 'window'.
WARN [2018-08-03 10:25:06,585] CommandBarExtensionRegistry - RibbonTab '' does not exist in the current context (it is referred to by command bar item 'LanguageCloudAction').
WARN [2018-08-03 10:25:06,585] CommandBarExtensionRegistry - Command bar with path 'TranslationStudio.File.NewMenu' does not exist within parent command bar 'TranslationStudio.HomeRibbon'.
INFO [2018-08-03 10:25:10,292] Job - Start#Id=6369ea21-f272-4f14-aadc-5e0d70c21d3a#Name=Updating auto-propagation index#ProcessName=SDLTradosStudio#PhysicalMemorySize=448544768#VirtualMemorySize=376905728#ThreadCount=42#HandleCount=1869#GdiHandleCount=1365#UserHandleCount=764#TotalProcessorTime=00:00:37.6406250
WARN [2018-08-03 10:25:10,588] CommandBarExtensionRegistry - Command bar with path 'ProjectsView_ProjectsListViewPart_ContextMenu' does not exist within parent command bar 'window'.
WARN [2018-08-03 10:25:10,588] CommandBarExtensionRegistry - Command bar with path 'help' does not exist within parent command bar 'window'.
WARN [2018-08-03 10:25:10,588] CommandBarExtensionRegistry - RibbonTab '' does not exist in the current context (it is referred to by command bar item 'LanguageCloudAction').
WARN [2018-08-03 10:25:10,588] CommandBarExtensionRegistry - Command bar with path 'TranslationStudio.File.NewMenu' does not exist within parent command bar 'TranslationStudio.HomeRibbon'.
INFO [2018-08-03 10:25:10,645] ActionService - Finish#Id=4b37587a-d9f4-4483-82f2-1351f05cb428#Name=OpenForTranslationContextAction#ProcessName=SDLTradosStudio#PhysicalMemorySize=452677632#VirtualMemorySize=380059648#ThreadCount=44#HandleCount=1885#GdiHandleCount=1384#UserHandleCount=771#TotalProcessorTime=00:00:39.0312500
INFO [2018-08-03 10:25:12,348] Sdl.TranslationStudio.Editor.Terminology.EditorTermbaseProvider - RecognitionComplete - the number of calls to the server = 0
INFO [2018-08-03 10:25:14,063] Sdl.TranslationStudio.Editor.Terminology.EditorTermbaseProvider - RecognitionComplete - the number of calls to the server = 0
INFO [2018-08-03 10:25:28,166] Job - Finish#Id=6369ea21-f272-4f14-aadc-5e0d70c21d3a#Name=Updating auto-propagation index#ProcessName=SDLTradosStudio#PhysicalMemorySize=501608448#VirtualMemorySize=436854784#ThreadCount=55#HandleCount=2188#GdiHandleCount=1367#UserHandleCount=777#TotalProcessorTime=00:01:15.3593750
INFO [2018-08-03 10:34:08,934] ActionService - Start#Id=10a6065b-64c9-4e08-a5b8-6a1bb8b0ba73#Name=ConfirmAndMoveToNextUnconfirmedSegmentAction#ProcessName=SDLTradosStudio#PhysicalMemorySize=491405312#VirtualMemorySize=432877568#ThreadCount=45#HandleCount=2041#GdiHandleCount=1368#UserHandleCount=775#TotalProcessorTime=00:01:16.1406250
INFO [2018-08-03 10:34:09,021] Job - Start#Id=b538b75f-e3ff-41ea-bcb8-a7d4fe9beb78#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=492679168#VirtualMemorySize=433664000#ThreadCount=45#HandleCount=2046#GdiHandleCount=1368#UserHandleCount=776#TotalProcessorTime=00:01:16.2812500
INFO [2018-08-03 10:34:09,021] Job - Start#Id=3d952049-f3b6-42d9-bc69-b7178cae536b#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=492879872#VirtualMemorySize=434233344#ThreadCount=45#HandleCount=2049#GdiHandleCount=1368#UserHandleCount=778#TotalProcessorTime=00:01:16.2812500
INFO [2018-08-03 10:34:09,021] Job - Start#Id=ff5bf363-b788-4eff-b6bb-301bf1a89bf9#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=492879872#VirtualMemorySize=434233344#ThreadCount=45#HandleCount=2049#GdiHandleCount=1368#UserHandleCount=778#TotalProcessorTime=00:01:16.2812500
INFO [2018-08-03 10:34:09,021] Job - Finish#Id=b538b75f-e3ff-41ea-bcb8-a7d4fe9beb78#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=492711936#VirtualMemorySize=433688576#ThreadCount=45#HandleCount=2055#GdiHandleCount=1368#UserHandleCount=778#TotalProcessorTime=00:01:16.2812500
INFO [2018-08-03 10:34:09,021] Job - Finish#Id=ff5bf363-b788-4eff-b6bb-301bf1a89bf9#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=492765184#VirtualMemorySize=434065408#ThreadCount=46#HandleCount=2058#GdiHandleCount=1368#UserHandleCount=778#TotalProcessorTime=00:01:16.2812500
INFO [2018-08-03 10:34:09,021] Job - Finish#Id=3d952049-f3b6-42d9-bc69-b7178cae536b#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=492765184#VirtualMemorySize=434065408#ThreadCount=46#HandleCount=2058#GdiHandleCount=1368#UserHandleCount=778#TotalProcessorTime=00:01:16.2812500
INFO [2018-08-03 10:34:09,378] ActionService - Finish#Id=10a6065b-64c9-4e08-a5b8-6a1bb8b0ba73#Name=ConfirmAndMoveToNextUnconfirmedSegmentAction#ProcessName=SDLTradosStudio#PhysicalMemorySize=495677440#VirtualMemorySize=437067776#ThreadCount=45#HandleCount=2055#GdiHandleCount=1371#UserHandleCount=779#TotalProcessorTime=00:01:16.5625000
INFO [2018-08-03 10:34:10,176] Sdl.TranslationStudio.Editor.Terminology.EditorTermbaseProvider - RecognitionComplete - the number of calls to the server = 0
INFO [2018-08-03 10:34:10,361] Sdl.TranslationStudio.Editor.Terminology.EditorTermbaseProvider - RecognitionComplete - the number of calls to the server = 0
INFO [2018-08-03 10:34:26,544] ActionService - Start#Id=ebae4e48-637b-46b5-bba2-9bca844553e3#Name=ConfirmAndMoveToNextSegmentAction#ProcessName=SDLTradosStudio#PhysicalMemorySize=514768896#VirtualMemorySize=456392704#ThreadCount=46#HandleCount=2093#GdiHandleCount=1384#UserHandleCount=789#TotalProcessorTime=00:01:19.7031250
INFO [2018-08-03 10:34:26,576] Job - Start#Id=ede53380-996a-4186-ac0d-dc4a30b27ac8#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=514789376#VirtualMemorySize=456212480#ThreadCount=46#HandleCount=2094#GdiHandleCount=1388#UserHandleCount=789#TotalProcessorTime=00:01:19.7500000
INFO [2018-08-03 10:34:26,582] Job - Start#Id=77208f9a-6266-4c4b-be25-5db785af4afa#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=514789376#VirtualMemorySize=456409088#ThreadCount=46#HandleCount=2095#GdiHandleCount=1386#UserHandleCount=789#TotalProcessorTime=00:01:19.7500000
INFO [2018-08-03 10:34:26,582] Job - Start#Id=0a67fe28-8794-4369-bcbd-314ab7d741b6#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=514789376#VirtualMemorySize=456409088#ThreadCount=46#HandleCount=2095#GdiHandleCount=1386#UserHandleCount=789#TotalProcessorTime=00:01:19.7500000
INFO [2018-08-03 10:34:26,582] Job - Finish#Id=ede53380-996a-4186-ac0d-dc4a30b27ac8#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=514596864#VirtualMemorySize=456560640#ThreadCount=48#HandleCount=2105#GdiHandleCount=1385#UserHandleCount=789#TotalProcessorTime=00:01:19.7500000
INFO [2018-08-03 10:34:26,582] Job - Finish#Id=77208f9a-6266-4c4b-be25-5db785af4afa#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=514973696#VirtualMemorySize=456560640#ThreadCount=48#HandleCount=2107#GdiHandleCount=1384#UserHandleCount=789#TotalProcessorTime=00:01:19.7500000
INFO [2018-08-03 10:34:26,582] Job - Finish#Id=0a67fe28-8794-4369-bcbd-314ab7d741b6#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=514093056#VirtualMemorySize=455606272#ThreadCount=48#HandleCount=2109#GdiHandleCount=1384#UserHandleCount=789#TotalProcessorTime=00:01:19.7500000
INFO [2018-08-03 10:34:26,930] ActionService - Finish#Id=ebae4e48-637b-46b5-bba2-9bca844553e3#Name=ConfirmAndMoveToNextSegmentAction#ProcessName=SDLTradosStudio#PhysicalMemorySize=515538944#VirtualMemorySize=458084352#ThreadCount=48#HandleCount=2114#GdiHandleCount=1387#UserHandleCount=791#TotalProcessorTime=00:01:20.1093750
INFO [2018-08-03 10:34:27,419] Sdl.TranslationStudio.Editor.Terminology.EditorTermbaseProvider - RecognitionComplete - the number of calls to the server = 0
INFO [2018-08-03 10:34:28,885] ActionService - Start#Id=e6700f08-4157-4c1f-9707-cd2dc759e0ed#Name=ConfirmAndMoveToNextUnconfirmedSegmentAction#ProcessName=SDLTradosStudio#PhysicalMemorySize=522649600#VirtualMemorySize=464781312#ThreadCount=48#HandleCount=2124#GdiHandleCount=1401#UserHandleCount=801#TotalProcessorTime=00:01:21.0156250
INFO [2018-08-03 10:34:28,901] Job - Start#Id=646e3415-9eed-4097-ad36-2bb3f010476b#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=522715136#VirtualMemorySize=464683008#ThreadCount=48#HandleCount=2125#GdiHandleCount=1401#UserHandleCount=801#TotalProcessorTime=00:01:21.0312500
INFO [2018-08-03 10:34:28,901] Job - Finish#Id=646e3415-9eed-4097-ad36-2bb3f010476b#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=523022336#VirtualMemorySize=464781312#ThreadCount=48#HandleCount=2126#GdiHandleCount=1401#UserHandleCount=801#TotalProcessorTime=00:01:21.0312500
INFO [2018-08-03 10:34:28,901] Job - Start#Id=0bcbff97-d2ba-4223-bd1f-90dee2f7ddb1#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=523022336#VirtualMemorySize=464781312#ThreadCount=48#HandleCount=2126#GdiHandleCount=1401#UserHandleCount=801#TotalProcessorTime=00:01:21.0312500
INFO [2018-08-03 10:34:28,901] Job - Start#Id=ca454179-efc2-4a8f-9747-a3f6ce3b9add#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=523022336#VirtualMemorySize=464781312#ThreadCount=48#HandleCount=2126#GdiHandleCount=1401#UserHandleCount=801#TotalProcessorTime=00:01:21.0312500
INFO [2018-08-03 10:34:28,901] Job - Finish#Id=0bcbff97-d2ba-4223-bd1f-90dee2f7ddb1#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=522645504#VirtualMemorySize=464683008#ThreadCount=48#HandleCount=2130#GdiHandleCount=1401#UserHandleCount=801#TotalProcessorTime=00:01:21.0312500
INFO [2018-08-03 10:34:28,901] Job - Finish#Id=ca454179-efc2-4a8f-9747-a3f6ce3b9add#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=522788864#VirtualMemorySize=464912384#ThreadCount=48#HandleCount=2133#GdiHandleCount=1401#UserHandleCount=801#TotalProcessorTime=00:01:21.0312500
INFO [2018-08-03 10:34:29,001] ActionService - Finish#Id=e6700f08-4157-4c1f-9707-cd2dc759e0ed#Name=ConfirmAndMoveToNextUnconfirmedSegmentAction#ProcessName=SDLTradosStudio#PhysicalMemorySize=522997760#VirtualMemorySize=465096704#ThreadCount=47#HandleCount=2134#GdiHandleCount=1401#UserHandleCount=800#TotalProcessorTime=00:01:21.1250000
INFO [2018-08-03 10:34:29,084] Sdl.TranslationStudio.Editor.Terminology.EditorTermbaseProvider - RecognitionComplete - the number of calls to the server = 0
INFO [2018-08-03 10:34:29,631] Sdl.TranslationStudio.Editor.Terminology.EditorTermbaseProvider - RecognitionComplete - the number of calls to the server = 0
INFO [2018-08-03 10:34:35,942] ActionService - Start#Id=c648faa2-f806-4930-8575-bc68954636e0#Name=ConfirmAndMoveToNextUnconfirmedSegmentAction#ProcessName=SDLTradosStudio#PhysicalMemorySize=522113024#VirtualMemorySize=464662528#ThreadCount=49#HandleCount=2113#GdiHandleCount=1383#UserHandleCount=792#TotalProcessorTime=00:01:22.0625000
INFO [2018-08-03 10:34:35,957] Job - Start#Id=e4f9174a-82a4-4601-8d38-e67307666321#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=522489856#VirtualMemorySize=464568320#ThreadCount=49#HandleCount=2113#GdiHandleCount=1383#UserHandleCount=792#TotalProcessorTime=00:01:22.1250000
INFO [2018-08-03 10:34:35,957] Job - Start#Id=c7f8bd5f-ed78-4a0e-9216-238ecb4bec32#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=522489856#VirtualMemorySize=464658432#ThreadCount=49#HandleCount=2114#GdiHandleCount=1383#UserHandleCount=792#TotalProcessorTime=00:01:22.1250000
INFO [2018-08-03 10:34:35,957] Job - Start#Id=e6f590fe-ee8b-463c-a355-86dba385a358#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=522489856#VirtualMemorySize=464658432#ThreadCount=49#HandleCount=2114#GdiHandleCount=1383#UserHandleCount=792#TotalProcessorTime=00:01:22.1250000
INFO [2018-08-03 10:34:35,957] Job - Finish#Id=e4f9174a-82a4-4601-8d38-e67307666321#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=522244096#VirtualMemorySize=464568320#ThreadCount=49#HandleCount=2116#GdiHandleCount=1383#UserHandleCount=792#TotalProcessorTime=00:01:22.1250000
INFO [2018-08-03 10:34:35,957] Job - Finish#Id=c7f8bd5f-ed78-4a0e-9216-238ecb4bec32#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=522489856#VirtualMemorySize=464662528#ThreadCount=49#HandleCount=2118#GdiHandleCount=1383#UserHandleCount=792#TotalProcessorTime=00:01:22.1250000
INFO [2018-08-03 10:34:35,957] Job - Finish#Id=e6f590fe-ee8b-463c-a355-86dba385a358#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=521736192#VirtualMemorySize=463810560#ThreadCount=49#HandleCount=2115#GdiHandleCount=1383#UserHandleCount=792#TotalProcessorTime=00:01:22.1250000
INFO [2018-08-03 10:34:36,142] ActionService - Finish#Id=c648faa2-f806-4930-8575-bc68954636e0#Name=ConfirmAndMoveToNextUnconfirmedSegmentAction#ProcessName=SDLTradosStudio#PhysicalMemorySize=521621504#VirtualMemorySize=463826944#ThreadCount=48#HandleCount=2119#GdiHandleCount=1386#UserHandleCount=795#TotalProcessorTime=00:01:22.2656250
INFO [2018-08-03 10:34:36,202] Sdl.TranslationStudio.Editor.Terminology.EditorTermbaseProvider - RecognitionComplete - the number of calls to the server = 0
INFO [2018-08-03 10:34:40,582] ActionService - Start#Id=a1f51858-6db5-4c5a-bc28-f5717a75606b#Name=ConfirmAndMoveToNextUnconfirmedSegmentAction#ProcessName=SDLTradosStudio#PhysicalMemorySize=523657216#VirtualMemorySize=465698816#ThreadCount=48#HandleCount=2130#GdiHandleCount=1392#UserHandleCount=796#TotalProcessorTime=00:01:22.5937500
INFO [2018-08-03 10:34:40,597] Job - Start#Id=e4190392-bf75-44e3-97fb-135fea659439#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=518639616#VirtualMemorySize=460259328#ThreadCount=49#HandleCount=2132#GdiHandleCount=1392#UserHandleCount=796#TotalProcessorTime=00:01:22.6562500
INFO [2018-08-03 10:34:40,597] Job - Start#Id=387b2e5b-e2f7-40c3-b840-1b30dfc08d80#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=518639616#VirtualMemorySize=460349440#ThreadCount=49#HandleCount=2133#GdiHandleCount=1392#UserHandleCount=796#TotalProcessorTime=00:01:22.6562500
INFO [2018-08-03 10:34:40,597] Job - Start#Id=47011e7f-8864-460a-9add-95cd7dbd5821#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=518639616#VirtualMemorySize=460349440#ThreadCount=49#HandleCount=2133#GdiHandleCount=1392#UserHandleCount=796#TotalProcessorTime=00:01:22.6562500
INFO [2018-08-03 10:34:40,597] Job - Finish#Id=e4190392-bf75-44e3-97fb-135fea659439#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=518262784#VirtualMemorySize=459878400#ThreadCount=49#HandleCount=2135#GdiHandleCount=1392#UserHandleCount=796#TotalProcessorTime=00:01:22.6562500
INFO [2018-08-03 10:34:40,597] Job - Finish#Id=387b2e5b-e2f7-40c3-b840-1b30dfc08d80#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=518258688#VirtualMemorySize=459874304#ThreadCount=49#HandleCount=2137#GdiHandleCount=1392#UserHandleCount=796#TotalProcessorTime=00:01:22.6562500
INFO [2018-08-03 10:34:40,597] Job - Finish#Id=47011e7f-8864-460a-9add-95cd7dbd5821#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=518258688#VirtualMemorySize=459874304#ThreadCount=49#HandleCount=2120#GdiHandleCount=1389#UserHandleCount=795#TotalProcessorTime=00:01:22.6562500
INFO [2018-08-03 10:34:40,697] ActionService - Finish#Id=a1f51858-6db5-4c5a-bc28-f5717a75606b#Name=ConfirmAndMoveToNextUnconfirmedSegmentAction#ProcessName=SDLTradosStudio#PhysicalMemorySize=518938624#VirtualMemorySize=460922880#ThreadCount=48#HandleCount=2113#GdiHandleCount=1390#UserHandleCount=795#TotalProcessorTime=00:01:22.8281250
INFO [2018-08-03 10:34:40,801] Sdl.TranslationStudio.Editor.Terminology.EditorTermbaseProvider - RecognitionComplete - the number of calls to the server = 0
INFO [2018-08-03 10:34:42,191] ActionService - Start#Id=735c24c3-d1c3-4867-bdab-ab14ad43d4b1#Name=SelectMatch1Action#ProcessName=SDLTradosStudio#PhysicalMemorySize=520843264#VirtualMemorySize=462716928#ThreadCount=49#HandleCount=2133#GdiHandleCount=1406#UserHandleCount=800#TotalProcessorTime=00:01:23.2812500
INFO [2018-08-03 10:34:42,260] ActionService - Finish#Id=735c24c3-d1c3-4867-bdab-ab14ad43d4b1#Name=SelectMatch1Action#ProcessName=SDLTradosStudio#PhysicalMemorySize=521121792#VirtualMemorySize=463147008#ThreadCount=49#HandleCount=2139#GdiHandleCount=1406#UserHandleCount=800#TotalProcessorTime=00:01:23.3750000
INFO [2018-08-03 10:34:43,567] ActionService - Start#Id=bc6b4f9c-f013-40ae-a559-f034d33f208b#Name=ConfirmAndMoveToNextSegmentAction#ProcessName=SDLTradosStudio#PhysicalMemorySize=521101312#VirtualMemorySize=463073280#ThreadCount=48#HandleCount=2127#GdiHandleCount=1395#UserHandleCount=797#TotalProcessorTime=00:01:23.4218750
INFO [2018-08-03 10:34:43,582] Job - Start#Id=1121048d-1598-4ea9-81ed-88a9e697bf68#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=521125888#VirtualMemorySize=463048704#ThreadCount=49#HandleCount=2129#GdiHandleCount=1395#UserHandleCount=797#TotalProcessorTime=00:01:23.4843750
INFO [2018-08-03 10:34:43,582] Job - Start#Id=ce2ecd5b-a3ab-44f3-b953-857eb25eb87a#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=521125888#VirtualMemorySize=463142912#ThreadCount=49#HandleCount=2130#GdiHandleCount=1395#UserHandleCount=797#TotalProcessorTime=00:01:23.4843750
INFO [2018-08-03 10:34:43,582] Job - Start#Id=7f453866-8987-4464-931d-d222b4f8beef#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=521125888#VirtualMemorySize=463142912#ThreadCount=49#HandleCount=2130#GdiHandleCount=1395#UserHandleCount=797#TotalProcessorTime=00:01:23.4843750
INFO [2018-08-03 10:34:43,582] Job - Finish#Id=1121048d-1598-4ea9-81ed-88a9e697bf68#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=521125888#VirtualMemorySize=463048704#ThreadCount=49#HandleCount=2132#GdiHandleCount=1395#UserHandleCount=797#TotalProcessorTime=00:01:23.4843750
INFO [2018-08-03 10:34:43,582] Job - Finish#Id=ce2ecd5b-a3ab-44f3-b953-857eb25eb87a#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=521125888#VirtualMemorySize=463147008#ThreadCount=49#HandleCount=2134#GdiHandleCount=1395#UserHandleCount=797#TotalProcessorTime=00:01:23.4843750
INFO [2018-08-03 10:34:43,582] Job - Finish#Id=7f453866-8987-4464-931d-d222b4f8beef#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=520376320#VirtualMemorySize=462295040#ThreadCount=49#HandleCount=2137#GdiHandleCount=1395#UserHandleCount=797#TotalProcessorTime=00:01:23.4843750
INFO [2018-08-03 10:34:43,683] ActionService - Finish#Id=bc6b4f9c-f013-40ae-a559-f034d33f208b#Name=ConfirmAndMoveToNextSegmentAction#ProcessName=SDLTradosStudio#PhysicalMemorySize=520814592#VirtualMemorySize=463159296#ThreadCount=49#HandleCount=2139#GdiHandleCount=1396#UserHandleCount=797#TotalProcessorTime=00:01:23.5937500
INFO [2018-08-03 10:34:43,766] Sdl.TranslationStudio.Editor.Terminology.EditorTermbaseProvider - RecognitionComplete - the number of calls to the server = 0
INFO [2018-08-03 10:34:45,378] ActionService - Start#Id=eff01380-81e9-4ae9-85d5-951bd88829f4#Name=SelectMatch1Action#ProcessName=SDLTradosStudio#PhysicalMemorySize=520794112#VirtualMemorySize=463101952#ThreadCount=48#HandleCount=2128#GdiHandleCount=1401#UserHandleCount=799#TotalProcessorTime=00:01:23.8593750
INFO [2018-08-03 10:34:45,420] ActionService - Finish#Id=eff01380-81e9-4ae9-85d5-951bd88829f4#Name=SelectMatch1Action#ProcessName=SDLTradosStudio#PhysicalMemorySize=520790016#VirtualMemorySize=463093760#ThreadCount=48#HandleCount=2134#GdiHandleCount=1401#UserHandleCount=799#TotalProcessorTime=00:01:23.9062500
INFO [2018-08-03 10:34:46,243] ActionService - Start#Id=eb25e8bc-f6cc-45fc-8264-fb75748992ff#Name=ConfirmAndMoveToNextSegmentAction#ProcessName=SDLTradosStudio#PhysicalMemorySize=520826880#VirtualMemorySize=463163392#ThreadCount=49#HandleCount=2129#GdiHandleCount=1401#UserHandleCount=799#TotalProcessorTime=00:01:23.9062500
INFO [2018-08-03 10:34:46,259] Job - Start#Id=002abfb6-731e-40be-ae53-64aa1f544b32#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=521195520#VirtualMemorySize=463065088#ThreadCount=49#HandleCount=2130#GdiHandleCount=1401#UserHandleCount=799#TotalProcessorTime=00:01:24
INFO [2018-08-03 10:34:46,259] Job - Start#Id=cc58a59b-c961-4023-87d4-0526959badfc#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=521195520#VirtualMemorySize=463159296#ThreadCount=49#HandleCount=2131#GdiHandleCount=1401#UserHandleCount=799#TotalProcessorTime=00:01:24
INFO [2018-08-03 10:34:46,265] Job - Start#Id=b26d9470-b999-47a5-8d50-5afd080a0691#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=521195520#VirtualMemorySize=463159296#ThreadCount=49#HandleCount=2131#GdiHandleCount=1401#UserHandleCount=799#TotalProcessorTime=00:01:24
INFO [2018-08-03 10:34:46,259] Job - Finish#Id=002abfb6-731e-40be-ae53-64aa1f544b32#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=520822784#VirtualMemorySize=463065088#ThreadCount=49#HandleCount=2131#GdiHandleCount=1401#UserHandleCount=799#TotalProcessorTime=00:01:24
INFO [2018-08-03 10:34:46,265] Job - Finish#Id=cc58a59b-c961-4023-87d4-0526959badfc#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=520818688#VirtualMemorySize=463065088#ThreadCount=49#HandleCount=2133#GdiHandleCount=1401#UserHandleCount=799#TotalProcessorTime=00:01:24
INFO [2018-08-03 10:34:46,265] Job - Finish#Id=b26d9470-b999-47a5-8d50-5afd080a0691#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=520818688#VirtualMemorySize=463163392#ThreadCount=49#HandleCount=2135#GdiHandleCount=1401#UserHandleCount=799#TotalProcessorTime=00:01:24
INFO [2018-08-03 10:34:46,377] ActionService - Finish#Id=eb25e8bc-f6cc-45fc-8264-fb75748992ff#Name=ConfirmAndMoveToNextSegmentAction#ProcessName=SDLTradosStudio#PhysicalMemorySize=520822784#VirtualMemorySize=463163392#ThreadCount=49#HandleCount=2135#GdiHandleCount=1402#UserHandleCount=799#TotalProcessorTime=00:01:24.0781250
INFO [2018-08-03 10:34:46,466] Sdl.TranslationStudio.Editor.Terminology.EditorTermbaseProvider - RecognitionComplete - the number of calls to the server = 0
INFO [2018-08-03 10:35:11,270] ActionService - Start#Id=3de83649-c1d0-4bff-9676-82ea1c268075#Name=ConfirmAndMoveToNextSegmentAction#ProcessName=SDLTradosStudio#PhysicalMemorySize=519340032#VirtualMemorySize=461414400#ThreadCount=43#HandleCount=2105#GdiHandleCount=1401#UserHandleCount=791#TotalProcessorTime=00:01:24.5000000
INFO [2018-08-03 10:35:11,298] Job - Start#Id=65543cdd-5479-44f3-91f9-97c736ccba35#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=519708672#VirtualMemorySize=461316096#ThreadCount=43#HandleCount=2106#GdiHandleCount=1405#UserHandleCount=792#TotalProcessorTime=00:01:24.5312500
INFO [2018-08-03 10:35:11,298] Job - Start#Id=b9d4eb31-990f-494f-b993-57fbb1a1b956#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=519716864#VirtualMemorySize=461402112#ThreadCount=43#HandleCount=2109#GdiHandleCount=1401#UserHandleCount=792#TotalProcessorTime=00:01:24.5312500
INFO [2018-08-03 10:35:11,298] Job - Start#Id=ea1b277c-7a50-48eb-9e61-cb8dd511f863#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=519716864#VirtualMemorySize=461402112#ThreadCount=43#HandleCount=2109#GdiHandleCount=1401#UserHandleCount=792#TotalProcessorTime=00:01:24.5312500
INFO [2018-08-03 10:35:11,298] Job - Finish#Id=65543cdd-5479-44f3-91f9-97c736ccba35#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=519475200#VirtualMemorySize=461320192#ThreadCount=43#HandleCount=2111#GdiHandleCount=1401#UserHandleCount=792#TotalProcessorTime=00:01:24.5312500
INFO [2018-08-03 10:35:11,298] Job - Finish#Id=b9d4eb31-990f-494f-b993-57fbb1a1b956#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=519716864#VirtualMemorySize=461418496#ThreadCount=43#HandleCount=2113#GdiHandleCount=1401#UserHandleCount=792#TotalProcessorTime=00:01:24.5312500
INFO [2018-08-03 10:35:11,298] Job - Finish#Id=ea1b277c-7a50-48eb-9e61-cb8dd511f863#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=518975488#VirtualMemorySize=460562432#ThreadCount=43#HandleCount=2115#GdiHandleCount=1401#UserHandleCount=792#TotalProcessorTime=00:01:24.5312500
INFO [2018-08-03 10:35:11,616] ActionService - Finish#Id=3de83649-c1d0-4bff-9676-82ea1c268075#Name=ConfirmAndMoveToNextSegmentAction#ProcessName=SDLTradosStudio#PhysicalMemorySize=517308416#VirtualMemorySize=459145216#ThreadCount=46#HandleCount=2124#GdiHandleCount=1404#UserHandleCount=795#TotalProcessorTime=00:01:24.7187500
INFO [2018-08-03 10:35:11,770] Sdl.TranslationStudio.Editor.Terminology.EditorTermbaseProvider - RecognitionComplete - the number of calls to the server = 0
INFO [2018-08-03 10:35:21,717] ActionService - Start#Id=d0091626-639c-45cb-b133-bf0f020a5263#Name=ConfirmAndMoveToNextSegmentAction#ProcessName=SDLTradosStudio#PhysicalMemorySize=518934528#VirtualMemorySize=461045760#ThreadCount=45#HandleCount=2141#GdiHandleCount=1410#UserHandleCount=797#TotalProcessorTime=00:01:24.9218750
INFO [2018-08-03 10:35:21,733] Job - Start#Id=43f0be6d-35e4-4cf3-910a-2eefbb677471#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=519319552#VirtualMemorySize=461012992#ThreadCount=46#HandleCount=2143#GdiHandleCount=1410#UserHandleCount=797#TotalProcessorTime=00:01:24.9375000
INFO [2018-08-03 10:35:21,733] Job - Start#Id=a0ca66bf-ab69-4245-a03d-b8de0438b788#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=519319552#VirtualMemorySize=461094912#ThreadCount=46#HandleCount=2144#GdiHandleCount=1410#UserHandleCount=797#TotalProcessorTime=00:01:24.9375000
INFO [2018-08-03 10:35:21,733] Job - Start#Id=0eaa49d4-b92b-40e5-9901-f2cb07e17add#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=519319552#VirtualMemorySize=461094912#ThreadCount=46#HandleCount=2144#GdiHandleCount=1410#UserHandleCount=798#TotalProcessorTime=00:01:24.9375000
INFO [2018-08-03 10:35:21,733] Job - Finish#Id=43f0be6d-35e4-4cf3-910a-2eefbb677471#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=519327744#VirtualMemorySize=461017088#ThreadCount=46#HandleCount=2148#GdiHandleCount=1410#UserHandleCount=798#TotalProcessorTime=00:01:24.9375000
INFO [2018-08-03 10:35:21,733] Job - Finish#Id=a0ca66bf-ab69-4245-a03d-b8de0438b788#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=519327744#VirtualMemorySize=461119488#ThreadCount=46#HandleCount=2150#GdiHandleCount=1410#UserHandleCount=798#TotalProcessorTime=00:01:24.9375000
INFO [2018-08-03 10:35:21,733] Job - Finish#Id=0eaa49d4-b92b-40e5-9901-f2cb07e17add#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=518590464#VirtualMemorySize=460259328#ThreadCount=46#HandleCount=2153#GdiHandleCount=1410#UserHandleCount=798#TotalProcessorTime=00:01:24.9375000
INFO [2018-08-03 10:35:21,849] ActionService - Finish#Id=d0091626-639c-45cb-b133-bf0f020a5263#Name=ConfirmAndMoveToNextSegmentAction#ProcessName=SDLTradosStudio#PhysicalMemorySize=519184384#VirtualMemorySize=461656064#ThreadCount=46#HandleCount=2155#GdiHandleCount=1411#UserHandleCount=799#TotalProcessorTime=00:01:25.0468750
INFO [2018-08-03 10:35:21,935] Sdl.TranslationStudio.Editor.Terminology.EditorTermbaseProvider - RecognitionComplete - the number of calls to the server = 0

Hello Piotr Bienkowski ,

Indeed there are a number of warnings

Unknown said:

WARN [2018-08-03 10:25:06,585] CommandBarExtensionRegistry - Command bar with path 'ProjectsView_ProjectsListViewPart_ContextMenu' does not exist within parent command bar 'window'.
WARN [2018-08-03 10:25:06,585] CommandBarExtensionRegistry - Command bar with path 'help' does not exist within parent command bar 'window'.
WARN [2018-08-03 10:25:06,585] CommandBarExtensionRegistry - RibbonTab '' does not exist in the current context (it is referred to by command bar item 'LanguageCloudAction').
WARN [2018-08-03 10:25:06,585] CommandBarExtensionRegistry - Command bar with path 'TranslationStudio.File.NewMenu' does not exist within parent command bar 'TranslationStudio.HomeRibbon'.
INFO [2018-08-03 10:25:10,292] Job - Start#Id=xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx#Name=Updating auto-propagation index#ProcessName=SDLTradosStudio#PhysicalMemorySize=448544768#VirtualMemorySize=376905728#ThreadCount=42#HandleCount=1869#GdiHandleCount=1365#UserHandleCount=764#TotalProcessorTime=00:00:37.6406250
WARN [2018-08-03 10:25:10,588] CommandBarExtensionRegistry - Command bar with path 'ProjectsView_ProjectsListViewPart_ContextMenu' does not exist within parent command bar 'window'.
WARN [2018-08-03 10:25:10,588] CommandBarExtensionRegistry - Command bar with path 'help' does not exist within parent command bar 'window'.
WARN [2018-08-03 10:25:10,588] CommandBarExtensionRegistry - RibbonTab '' does not exist in the current context (it is referred to by command bar item 'LanguageCloudAction').
WARN [2018-08-03 10:25:10,588] CommandBarExtensionRegistry - Command bar with path 'TranslationStudio.File.NewMenu' does not exist within parent command bar 'TranslationStudio.HomeRibbon'.
INFO [2018-08-03 10:25:10,645] ActionService - Finish#Id=4b37587a-d9f4-4483-82f2-

Which all appear to refer to the command bar, which leads me to believe something has caused a corruption.

If you were unable to even merge the segments- i would be surprised if this was the actual cause.

The first and easiest possible solution would be to reset the windows layout -

If this does not work then maybe a Studio reset is required-

You can use 'FreshStart' to simply the process-https://appstore.sdl.com/language/app/sdl-freshstart/876/

Just had another one at 16:54. What raises my suspicion are the lines about generating preview,
while I never actively used the preview feature after the installation of this Studio instance. I must look through the options again.

Here is the log excerpt.

INFO [2018-08-03 16:54:04,060] ActionService - Start#Id=88fc0230-53b2-4457-b2e0-07f7cd4c63c4#Name=ConfirmAndMoveToNextSegmentAction#ProcessName=SDLTradosStudio#PhysicalMemorySize=440418304#VirtualMemorySize=482336768#ThreadCount=47#HandleCount=2189#GdiHandleCount=1546#UserHandleCount=868#TotalProcessorTime=00:03:54.8906250
INFO [2018-08-03 16:54:04,075] Job - Start#Id=6f3aab84-f074-46cc-a734-1d538536ce9b#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=440815616#VirtualMemorySize=482340864#ThreadCount=48#HandleCount=2195#GdiHandleCount=1546#UserHandleCount=869#TotalProcessorTime=00:03:54.9062500
INFO [2018-08-03 16:54:04,075] Job - Start#Id=66045025-b959-488f-8930-4d0b8b237e97#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=440815616#VirtualMemorySize=482156544#ThreadCount=48#HandleCount=2198#GdiHandleCount=1546#UserHandleCount=871#TotalProcessorTime=00:03:54.9062500
INFO [2018-08-03 16:54:04,075] Job - Start#Id=7f95ac6f-dda5-4b1c-88e2-c964a92d3ea6#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=440815616#VirtualMemorySize=482156544#ThreadCount=48#HandleCount=2198#GdiHandleCount=1546#UserHandleCount=871#TotalProcessorTime=00:03:54.9062500
INFO [2018-08-03 16:54:04,075] Job - Finish#Id=6f3aab84-f074-46cc-a734-1d538536ce9b#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=440823808#VirtualMemorySize=482459648#ThreadCount=48#HandleCount=2204#GdiHandleCount=1546#UserHandleCount=871#TotalProcessorTime=00:03:54.9062500
INFO [2018-08-03 16:54:04,091] Job - Finish#Id=66045025-b959-488f-8930-4d0b8b237e97#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=440823808#VirtualMemorySize=482459648#ThreadCount=48#HandleCount=2207#GdiHandleCount=1546#UserHandleCount=871#TotalProcessorTime=00:03:54.9531250
INFO [2018-08-03 16:54:04,091] Job - Finish#Id=7f95ac6f-dda5-4b1c-88e2-c964a92d3ea6#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=440823808#VirtualMemorySize=482459648#ThreadCount=48#HandleCount=2209#GdiHandleCount=1546#UserHandleCount=871#TotalProcessorTime=00:03:54.9531250
INFO [2018-08-03 16:54:04,544] ActionService - Finish#Id=88fc0230-53b2-4457-b2e0-07f7cd4c63c4#Name=ConfirmAndMoveToNextSegmentAction#ProcessName=SDLTradosStudio#PhysicalMemorySize=441225216#VirtualMemorySize=482906112#ThreadCount=48#HandleCount=2214#GdiHandleCount=1550#UserHandleCount=873#TotalProcessorTime=00:03:55.1718750
INFO [2018-08-03 16:54:04,651] Sdl.TranslationStudio.Editor.Terminology.EditorTermbaseProvider - RecognitionComplete - the number of calls to the server = 0
INFO [2018-08-03 16:54:35,191] ActionService - Start#Id=1354d028-c144-4907-90ff-3f04600dddb2#Name=ConfirmAndMoveToNextSegmentAction#ProcessName=SDLTradosStudio#PhysicalMemorySize=441999360#VirtualMemorySize=483954688#ThreadCount=50#HandleCount=2214#GdiHandleCount=1547#UserHandleCount=874#TotalProcessorTime=00:03:56.6718750
INFO [2018-08-03 16:54:35,207] Job - Start#Id=75a0f9ea-106f-429e-8539-911e66e9ddbc#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=441999360#VirtualMemorySize=483835904#ThreadCount=50#HandleCount=2215#GdiHandleCount=1549#UserHandleCount=874#TotalProcessorTime=00:03:56.6875000
INFO [2018-08-03 16:54:35,207] Job - Start#Id=3077d9a8-402e-47c4-9cf8-74e0c9ad189c#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=441999360#VirtualMemorySize=483958784#ThreadCount=50#HandleCount=2216#GdiHandleCount=1547#UserHandleCount=875#TotalProcessorTime=00:03:56.6875000
INFO [2018-08-03 16:54:35,207] Job - Start#Id=cbc57895-2ce7-4bd1-a737-b26deecd56c4#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=441999360#VirtualMemorySize=483958784#ThreadCount=50#HandleCount=2216#GdiHandleCount=1547#UserHandleCount=875#TotalProcessorTime=00:03:56.6875000
INFO [2018-08-03 16:54:35,223] Job - Finish#Id=75a0f9ea-106f-429e-8539-911e66e9ddbc#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=442003456#VirtualMemorySize=483962880#ThreadCount=50#HandleCount=2220#GdiHandleCount=1547#UserHandleCount=875#TotalProcessorTime=00:03:56.7500000
INFO [2018-08-03 16:54:35,223] Job - Finish#Id=3077d9a8-402e-47c4-9cf8-74e0c9ad189c#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=441651200#VirtualMemorySize=483311616#ThreadCount=50#HandleCount=2223#GdiHandleCount=1547#UserHandleCount=875#TotalProcessorTime=00:03:56.7500000
INFO [2018-08-03 16:54:35,223] Job - Finish#Id=cbc57895-2ce7-4bd1-a737-b26deecd56c4#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=441655296#VirtualMemorySize=483962880#ThreadCount=50#HandleCount=2225#GdiHandleCount=1547#UserHandleCount=875#TotalProcessorTime=00:03:56.7500000
INFO [2018-08-03 16:54:35,481] ActionService - Finish#Id=1354d028-c144-4907-90ff-3f04600dddb2#Name=ConfirmAndMoveToNextSegmentAction#ProcessName=SDLTradosStudio#PhysicalMemorySize=441913344#VirtualMemorySize=483979264#ThreadCount=50#HandleCount=2228#GdiHandleCount=1551#UserHandleCount=876#TotalProcessorTime=00:03:56.9531250
INFO [2018-08-03 16:54:35,584] Sdl.TranslationStudio.Editor.Terminology.EditorTermbaseProvider - RecognitionComplete - the number of calls to the server = 0
INFO [2018-08-03 16:54:40,048] ActionService - Start#Id=64e81a0b-a82b-48ee-9ca8-4a023e1e2d03#Name=CopySourceToTargetAction#ProcessName=SDLTradosStudio#PhysicalMemorySize=441442304#VirtualMemorySize=483725312#ThreadCount=50#HandleCount=2216#GdiHandleCount=1550#UserHandleCount=877#TotalProcessorTime=00:03:57.7968750
INFO [2018-08-03 16:54:40,095] ActionService - Finish#Id=64e81a0b-a82b-48ee-9ca8-4a023e1e2d03#Name=CopySourceToTargetAction#ProcessName=SDLTradosStudio#PhysicalMemorySize=441090048#VirtualMemorySize=482721792#ThreadCount=50#HandleCount=2216#GdiHandleCount=1551#UserHandleCount=877#TotalProcessorTime=00:03:57.8750000
INFO [2018-08-03 16:54:41,766] ActionService - Start#Id=f2a0eca7-7822-467f-870c-183eb16670bf#Name=EditMenu_ConfirmationLevel_Translated#ProcessName=SDLTradosStudio#PhysicalMemorySize=441286656#VirtualMemorySize=482828288#ThreadCount=50#HandleCount=2216#GdiHandleCount=1553#UserHandleCount=878#TotalProcessorTime=00:03:58.0781250
INFO [2018-08-03 16:54:41,823] ActionService - Finish#Id=f2a0eca7-7822-467f-870c-183eb16670bf#Name=EditMenu_ConfirmationLevel_Translated#ProcessName=SDLTradosStudio#PhysicalMemorySize=441294848#VirtualMemorySize=482824192#ThreadCount=50#HandleCount=2216#GdiHandleCount=1553#UserHandleCount=878#TotalProcessorTime=00:03:58.1406250
INFO [2018-08-03 16:54:53,019] ActionService - Start#Id=e55d8f3f-d58a-4535-9e36-32330a1ba650#Name=ConfirmAndMoveToNextSegmentAction#ProcessName=SDLTradosStudio#PhysicalMemorySize=440889344#VirtualMemorySize=482299904#ThreadCount=50#HandleCount=2219#GdiHandleCount=1556#UserHandleCount=881#TotalProcessorTime=00:03:58.9375000
INFO [2018-08-03 16:54:53,035] Job - Start#Id=def326d2-2556-4e49-b847-13a5a3086cd8#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=441593856#VirtualMemorySize=483184640#ThreadCount=50#HandleCount=2220#GdiHandleCount=1556#UserHandleCount=881#TotalProcessorTime=00:03:59
INFO [2018-08-03 16:54:53,035] Job - Start#Id=501db953-7e7b-4043-b4c5-8607007b4bb8#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=441241600#VirtualMemorySize=482533376#ThreadCount=50#HandleCount=2220#GdiHandleCount=1556#UserHandleCount=881#TotalProcessorTime=00:03:59
INFO [2018-08-03 16:54:53,035] Job - Start#Id=1094d2d5-7901-4fa4-b9b8-0611ca0e91b5#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=441241600#VirtualMemorySize=482533376#ThreadCount=50#HandleCount=2220#GdiHandleCount=1556#UserHandleCount=881#TotalProcessorTime=00:03:59
INFO [2018-08-03 16:54:53,035] Job - Finish#Id=def326d2-2556-4e49-b847-13a5a3086cd8#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=441438208#VirtualMemorySize=483209216#ThreadCount=52#HandleCount=2232#GdiHandleCount=1556#UserHandleCount=881#TotalProcessorTime=00:03:59
INFO [2018-08-03 16:54:53,035] Job - Finish#Id=1094d2d5-7901-4fa4-b9b8-0611ca0e91b5#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=441794560#VirtualMemorySize=483454976#ThreadCount=52#HandleCount=2235#GdiHandleCount=1556#UserHandleCount=881#TotalProcessorTime=00:03:59
INFO [2018-08-03 16:54:53,035] Job - Finish#Id=501db953-7e7b-4043-b4c5-8607007b4bb8#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=441794560#VirtualMemorySize=483454976#ThreadCount=52#HandleCount=2235#GdiHandleCount=1556#UserHandleCount=881#TotalProcessorTime=00:03:59
INFO [2018-08-03 16:54:53,248] ActionService - Finish#Id=e55d8f3f-d58a-4535-9e36-32330a1ba650#Name=ConfirmAndMoveToNextSegmentAction#ProcessName=SDLTradosStudio#PhysicalMemorySize=444633088#VirtualMemorySize=486395904#ThreadCount=53#HandleCount=2242#GdiHandleCount=1559#UserHandleCount=882#TotalProcessorTime=00:03:59.3125000
INFO [2018-08-03 16:54:53,351] Sdl.TranslationStudio.Editor.Terminology.EditorTermbaseProvider - RecognitionComplete - the number of calls to the server = 0
INFO [2018-08-03 16:54:57,765] ActionService - Start#Id=fe77c94a-8b0a-47f4-bbfa-5b0ac5e5c2b8#Name=ConfirmAndMoveToNextSegmentAction#ProcessName=SDLTradosStudio#PhysicalMemorySize=446054400#VirtualMemorySize=472272896#ThreadCount=54#HandleCount=2156#GdiHandleCount=1530#UserHandleCount=872#TotalProcessorTime=00:04:00.1406250
INFO [2018-08-03 16:54:57,781] Job - Start#Id=b9107eeb-23b0-4266-816a-daafa8965beb#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=446050304#VirtualMemorySize=472186880#ThreadCount=54#HandleCount=2157#GdiHandleCount=1530#UserHandleCount=872#TotalProcessorTime=00:04:00.1562500
INFO [2018-08-03 16:54:57,781] Job - Start#Id=84ef2f3d-54e7-42d4-ba41-66b8e58fe88e#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=446050304#VirtualMemorySize=472305664#ThreadCount=54#HandleCount=2158#GdiHandleCount=1530#UserHandleCount=872#TotalProcessorTime=00:04:00.1562500
INFO [2018-08-03 16:54:57,781] Job - Start#Id=5f699336-3414-4bdb-9c46-38b9c10c8b08#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=446050304#VirtualMemorySize=472305664#ThreadCount=54#HandleCount=2158#GdiHandleCount=1530#UserHandleCount=872#TotalProcessorTime=00:04:00.1562500
INFO [2018-08-03 16:54:57,781] Job - Finish#Id=b9107eeb-23b0-4266-816a-daafa8965beb#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=445825024#VirtualMemorySize=472186880#ThreadCount=54#HandleCount=2160#GdiHandleCount=1530#UserHandleCount=872#TotalProcessorTime=00:04:00.1562500
INFO [2018-08-03 16:54:57,781] Job - Finish#Id=84ef2f3d-54e7-42d4-ba41-66b8e58fe88e#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=445558784#VirtualMemorySize=471654400#ThreadCount=54#HandleCount=2162#GdiHandleCount=1530#UserHandleCount=872#TotalProcessorTime=00:04:00.1562500
INFO [2018-08-03 16:54:57,781] Job - Finish#Id=5f699336-3414-4bdb-9c46-38b9c10c8b08#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=445624320#VirtualMemorySize=472453120#ThreadCount=54#HandleCount=2165#GdiHandleCount=1530#UserHandleCount=872#TotalProcessorTime=00:04:00.1562500
INFO [2018-08-03 16:54:58,010] ActionService - Finish#Id=fe77c94a-8b0a-47f4-bbfa-5b0ac5e5c2b8#Name=ConfirmAndMoveToNextSegmentAction#ProcessName=SDLTradosStudio#PhysicalMemorySize=446005248#VirtualMemorySize=473780224#ThreadCount=54#HandleCount=2168#GdiHandleCount=1534#UserHandleCount=873#TotalProcessorTime=00:04:00.3437500
INFO [2018-08-03 16:54:58,102] Sdl.TranslationStudio.Editor.Terminology.EditorTermbaseProvider - RecognitionComplete - the number of calls to the server = 0

Just had another one at 16:54. What raises my suspicion are the lines about generating preview,
while I never actively used the preview feature after the installation of this Studio instance. I must look through the options again.

Here is the log excerpt.

INFO [2018-08-03 16:54:04,060] ActionService - Start#Id=88fc0230-53b2-4457-b2e0-07f7cd4c63c4#Name=ConfirmAndMoveToNextSegmentAction#ProcessName=SDLTradosStudio#PhysicalMemorySize=440418304#VirtualMemorySize=482336768#ThreadCount=47#HandleCount=2189#GdiHandleCount=1546#UserHandleCount=868#TotalProcessorTime=00:03:54.8906250
INFO [2018-08-03 16:54:04,075] Job - Start#Id=6f3aab84-f074-46cc-a734-1d538536ce9b#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=440815616#VirtualMemorySize=482340864#ThreadCount=48#HandleCount=2195#GdiHandleCount=1546#UserHandleCount=869#TotalProcessorTime=00:03:54.9062500
INFO [2018-08-03 16:54:04,075] Job - Start#Id=66045025-b959-488f-8930-4d0b8b237e97#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=440815616#VirtualMemorySize=482156544#ThreadCount=48#HandleCount=2198#GdiHandleCount=1546#UserHandleCount=871#TotalProcessorTime=00:03:54.9062500
INFO [2018-08-03 16:54:04,075] Job - Start#Id=7f95ac6f-dda5-4b1c-88e2-c964a92d3ea6#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=440815616#VirtualMemorySize=482156544#ThreadCount=48#HandleCount=2198#GdiHandleCount=1546#UserHandleCount=871#TotalProcessorTime=00:03:54.9062500
INFO [2018-08-03 16:54:04,075] Job - Finish#Id=6f3aab84-f074-46cc-a734-1d538536ce9b#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=440823808#VirtualMemorySize=482459648#ThreadCount=48#HandleCount=2204#GdiHandleCount=1546#UserHandleCount=871#TotalProcessorTime=00:03:54.9062500
INFO [2018-08-03 16:54:04,091] Job - Finish#Id=66045025-b959-488f-8930-4d0b8b237e97#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=440823808#VirtualMemorySize=482459648#ThreadCount=48#HandleCount=2207#GdiHandleCount=1546#UserHandleCount=871#TotalProcessorTime=00:03:54.9531250
INFO [2018-08-03 16:54:04,091] Job - Finish#Id=7f95ac6f-dda5-4b1c-88e2-c964a92d3ea6#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=440823808#VirtualMemorySize=482459648#ThreadCount=48#HandleCount=2209#GdiHandleCount=1546#UserHandleCount=871#TotalProcessorTime=00:03:54.9531250
INFO [2018-08-03 16:54:04,544] ActionService - Finish#Id=88fc0230-53b2-4457-b2e0-07f7cd4c63c4#Name=ConfirmAndMoveToNextSegmentAction#ProcessName=SDLTradosStudio#PhysicalMemorySize=441225216#VirtualMemorySize=482906112#ThreadCount=48#HandleCount=2214#GdiHandleCount=1550#UserHandleCount=873#TotalProcessorTime=00:03:55.1718750
INFO [2018-08-03 16:54:04,651] Sdl.TranslationStudio.Editor.Terminology.EditorTermbaseProvider - RecognitionComplete - the number of calls to the server = 0
INFO [2018-08-03 16:54:35,191] ActionService - Start#Id=1354d028-c144-4907-90ff-3f04600dddb2#Name=ConfirmAndMoveToNextSegmentAction#ProcessName=SDLTradosStudio#PhysicalMemorySize=441999360#VirtualMemorySize=483954688#ThreadCount=50#HandleCount=2214#GdiHandleCount=1547#UserHandleCount=874#TotalProcessorTime=00:03:56.6718750
INFO [2018-08-03 16:54:35,207] Job - Start#Id=75a0f9ea-106f-429e-8539-911e66e9ddbc#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=441999360#VirtualMemorySize=483835904#ThreadCount=50#HandleCount=2215#GdiHandleCount=1549#UserHandleCount=874#TotalProcessorTime=00:03:56.6875000
INFO [2018-08-03 16:54:35,207] Job - Start#Id=3077d9a8-402e-47c4-9cf8-74e0c9ad189c#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=441999360#VirtualMemorySize=483958784#ThreadCount=50#HandleCount=2216#GdiHandleCount=1547#UserHandleCount=875#TotalProcessorTime=00:03:56.6875000
INFO [2018-08-03 16:54:35,207] Job - Start#Id=cbc57895-2ce7-4bd1-a737-b26deecd56c4#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=441999360#VirtualMemorySize=483958784#ThreadCount=50#HandleCount=2216#GdiHandleCount=1547#UserHandleCount=875#TotalProcessorTime=00:03:56.6875000
INFO [2018-08-03 16:54:35,223] Job - Finish#Id=75a0f9ea-106f-429e-8539-911e66e9ddbc#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=442003456#VirtualMemorySize=483962880#ThreadCount=50#HandleCount=2220#GdiHandleCount=1547#UserHandleCount=875#TotalProcessorTime=00:03:56.7500000
INFO [2018-08-03 16:54:35,223] Job - Finish#Id=3077d9a8-402e-47c4-9cf8-74e0c9ad189c#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=441651200#VirtualMemorySize=483311616#ThreadCount=50#HandleCount=2223#GdiHandleCount=1547#UserHandleCount=875#TotalProcessorTime=00:03:56.7500000
INFO [2018-08-03 16:54:35,223] Job - Finish#Id=cbc57895-2ce7-4bd1-a737-b26deecd56c4#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=441655296#VirtualMemorySize=483962880#ThreadCount=50#HandleCount=2225#GdiHandleCount=1547#UserHandleCount=875#TotalProcessorTime=00:03:56.7500000
INFO [2018-08-03 16:54:35,481] ActionService - Finish#Id=1354d028-c144-4907-90ff-3f04600dddb2#Name=ConfirmAndMoveToNextSegmentAction#ProcessName=SDLTradosStudio#PhysicalMemorySize=441913344#VirtualMemorySize=483979264#ThreadCount=50#HandleCount=2228#GdiHandleCount=1551#UserHandleCount=876#TotalProcessorTime=00:03:56.9531250
INFO [2018-08-03 16:54:35,584] Sdl.TranslationStudio.Editor.Terminology.EditorTermbaseProvider - RecognitionComplete - the number of calls to the server = 0
INFO [2018-08-03 16:54:40,048] ActionService - Start#Id=64e81a0b-a82b-48ee-9ca8-4a023e1e2d03#Name=CopySourceToTargetAction#ProcessName=SDLTradosStudio#PhysicalMemorySize=441442304#VirtualMemorySize=483725312#ThreadCount=50#HandleCount=2216#GdiHandleCount=1550#UserHandleCount=877#TotalProcessorTime=00:03:57.7968750
INFO [2018-08-03 16:54:40,095] ActionService - Finish#Id=64e81a0b-a82b-48ee-9ca8-4a023e1e2d03#Name=CopySourceToTargetAction#ProcessName=SDLTradosStudio#PhysicalMemorySize=441090048#VirtualMemorySize=482721792#ThreadCount=50#HandleCount=2216#GdiHandleCount=1551#UserHandleCount=877#TotalProcessorTime=00:03:57.8750000
INFO [2018-08-03 16:54:41,766] ActionService - Start#Id=f2a0eca7-7822-467f-870c-183eb16670bf#Name=EditMenu_ConfirmationLevel_Translated#ProcessName=SDLTradosStudio#PhysicalMemorySize=441286656#VirtualMemorySize=482828288#ThreadCount=50#HandleCount=2216#GdiHandleCount=1553#UserHandleCount=878#TotalProcessorTime=00:03:58.0781250
INFO [2018-08-03 16:54:41,823] ActionService - Finish#Id=f2a0eca7-7822-467f-870c-183eb16670bf#Name=EditMenu_ConfirmationLevel_Translated#ProcessName=SDLTradosStudio#PhysicalMemorySize=441294848#VirtualMemorySize=482824192#ThreadCount=50#HandleCount=2216#GdiHandleCount=1553#UserHandleCount=878#TotalProcessorTime=00:03:58.1406250
INFO [2018-08-03 16:54:53,019] ActionService - Start#Id=e55d8f3f-d58a-4535-9e36-32330a1ba650#Name=ConfirmAndMoveToNextSegmentAction#ProcessName=SDLTradosStudio#PhysicalMemorySize=440889344#VirtualMemorySize=482299904#ThreadCount=50#HandleCount=2219#GdiHandleCount=1556#UserHandleCount=881#TotalProcessorTime=00:03:58.9375000
INFO [2018-08-03 16:54:53,035] Job - Start#Id=def326d2-2556-4e49-b847-13a5a3086cd8#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=441593856#VirtualMemorySize=483184640#ThreadCount=50#HandleCount=2220#GdiHandleCount=1556#UserHandleCount=881#TotalProcessorTime=00:03:59
INFO [2018-08-03 16:54:53,035] Job - Start#Id=501db953-7e7b-4043-b4c5-8607007b4bb8#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=441241600#VirtualMemorySize=482533376#ThreadCount=50#HandleCount=2220#GdiHandleCount=1556#UserHandleCount=881#TotalProcessorTime=00:03:59
INFO [2018-08-03 16:54:53,035] Job - Start#Id=1094d2d5-7901-4fa4-b9b8-0611ca0e91b5#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=441241600#VirtualMemorySize=482533376#ThreadCount=50#HandleCount=2220#GdiHandleCount=1556#UserHandleCount=881#TotalProcessorTime=00:03:59
INFO [2018-08-03 16:54:53,035] Job - Finish#Id=def326d2-2556-4e49-b847-13a5a3086cd8#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=441438208#VirtualMemorySize=483209216#ThreadCount=52#HandleCount=2232#GdiHandleCount=1556#UserHandleCount=881#TotalProcessorTime=00:03:59
INFO [2018-08-03 16:54:53,035] Job - Finish#Id=1094d2d5-7901-4fa4-b9b8-0611ca0e91b5#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=441794560#VirtualMemorySize=483454976#ThreadCount=52#HandleCount=2235#GdiHandleCount=1556#UserHandleCount=881#TotalProcessorTime=00:03:59
INFO [2018-08-03 16:54:53,035] Job - Finish#Id=501db953-7e7b-4043-b4c5-8607007b4bb8#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=441794560#VirtualMemorySize=483454976#ThreadCount=52#HandleCount=2235#GdiHandleCount=1556#UserHandleCount=881#TotalProcessorTime=00:03:59
INFO [2018-08-03 16:54:53,248] ActionService - Finish#Id=e55d8f3f-d58a-4535-9e36-32330a1ba650#Name=ConfirmAndMoveToNextSegmentAction#ProcessName=SDLTradosStudio#PhysicalMemorySize=444633088#VirtualMemorySize=486395904#ThreadCount=53#HandleCount=2242#GdiHandleCount=1559#UserHandleCount=882#TotalProcessorTime=00:03:59.3125000
INFO [2018-08-03 16:54:53,351] Sdl.TranslationStudio.Editor.Terminology.EditorTermbaseProvider - RecognitionComplete - the number of calls to the server = 0
INFO [2018-08-03 16:54:57,765] ActionService - Start#Id=fe77c94a-8b0a-47f4-bbfa-5b0ac5e5c2b8#Name=ConfirmAndMoveToNextSegmentAction#ProcessName=SDLTradosStudio#PhysicalMemorySize=446054400#VirtualMemorySize=472272896#ThreadCount=54#HandleCount=2156#GdiHandleCount=1530#UserHandleCount=872#TotalProcessorTime=00:04:00.1406250
INFO [2018-08-03 16:54:57,781] Job - Start#Id=b9107eeb-23b0-4266-816a-daafa8965beb#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=446050304#VirtualMemorySize=472186880#ThreadCount=54#HandleCount=2157#GdiHandleCount=1530#UserHandleCount=872#TotalProcessorTime=00:04:00.1562500
INFO [2018-08-03 16:54:57,781] Job - Start#Id=84ef2f3d-54e7-42d4-ba41-66b8e58fe88e#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=446050304#VirtualMemorySize=472305664#ThreadCount=54#HandleCount=2158#GdiHandleCount=1530#UserHandleCount=872#TotalProcessorTime=00:04:00.1562500
INFO [2018-08-03 16:54:57,781] Job - Start#Id=5f699336-3414-4bdb-9c46-38b9c10c8b08#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=446050304#VirtualMemorySize=472305664#ThreadCount=54#HandleCount=2158#GdiHandleCount=1530#UserHandleCount=872#TotalProcessorTime=00:04:00.1562500
INFO [2018-08-03 16:54:57,781] Job - Finish#Id=b9107eeb-23b0-4266-816a-daafa8965beb#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=445825024#VirtualMemorySize=472186880#ThreadCount=54#HandleCount=2160#GdiHandleCount=1530#UserHandleCount=872#TotalProcessorTime=00:04:00.1562500
INFO [2018-08-03 16:54:57,781] Job - Finish#Id=84ef2f3d-54e7-42d4-ba41-66b8e58fe88e#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=445558784#VirtualMemorySize=471654400#ThreadCount=54#HandleCount=2162#GdiHandleCount=1530#UserHandleCount=872#TotalProcessorTime=00:04:00.1562500
INFO [2018-08-03 16:54:57,781] Job - Finish#Id=5f699336-3414-4bdb-9c46-38b9c10c8b08#Name=Generating preview#ProcessName=SDLTradosStudio#PhysicalMemorySize=445624320#VirtualMemorySize=472453120#ThreadCount=54#HandleCount=2165#GdiHandleCount=1530#UserHandleCount=872#TotalProcessorTime=00:04:00.1562500
INFO [2018-08-03 16:54:58,010] ActionService - Finish#Id=fe77c94a-8b0a-47f4-bbfa-5b0ac5e5c2b8#Name=ConfirmAndMoveToNextSegmentAction#ProcessName=SDLTradosStudio#PhysicalMemorySize=446005248#VirtualMemorySize=473780224#ThreadCount=54#HandleCount=2168#GdiHandleCount=1534#UserHandleCount=873#TotalProcessorTime=00:04:00.3437500
INFO [2018-08-03 16:54:58,102] Sdl.TranslationStudio.Editor.Terminology.EditorTermbaseProvider - RecognitionComplete - the number of calls to the server = 0