This has been happening to me too, most annoying and time consuming. Happened after I updated as well. I'm going to read the link posted at the bottom. Hana Doudin 

For anyone experiencing speed problems or crashes in Trados...

I keep several functions that I rarely use turned OFF, which for me always prevents Trados Studio being slow or crashing. Even if you have no speed or stability problems normally, they can still happen occasionally with a big/old/complex project. Here's what works for me:

1) Go to File > Options > Editor > Automation then UNtick 'Enable LookAhead' under 'Translation Memory' and UNtick 'Enable verification of segment' under 'After Confirming Segments Manually'

Both these options should help speed things up. You can then verify the file after you've finished working on it all in one go via the Review tab > Verify or by clicking F8.

Then, in the Project Settings (or via File>Options if you create your own projects from scratch or work via Translate Single File), turn OFF upLift Match Repair:

Turning this setting OFF in each project I receive helps stabilise files that for some reason cause Studio to crash. I am sure it helps with speed too.

If you want to know what any setting means under File > Options or under Project Settings, click the Help button bottom right of the settings window:

Keeping these settings turned on if you need them should work fine if you have a hi-spec fast computer and an excellent broadband connection. However, in less than perfect scenarios or with huge slow projects, it can help to turn one or all of them off.

If the above isn't enough, I also keep Fragment Matching turned off, here:

As most of my work is proofreading in Review mode, I don't need fragment matching turned on. I even have the Fragment Matches window closed in the Editor view.

I always have them all turned off until I need them, and Studio works well for me...

I hope this helps,

All the best,

Ali

For anyone experiencing speed problems or crashes in Trados...

I keep several functions that I rarely use turned OFF, which for me always prevents Trados Studio being slow or crashing. Even if you have no speed or stability problems normally, they can still happen occasionally with a big/old/complex project. Here's what works for me:

1) Go to File > Options > Editor > Automation then UNtick 'Enable LookAhead' under 'Translation Memory' and UNtick 'Enable verification of segment' under 'After Confirming Segments Manually'

Both these options should help speed things up. You can then verify the file after you've finished working on it all in one go via the Review tab > Verify or by clicking F8.

Then, in the Project Settings (or via File>Options if you create your own projects from scratch or work via Translate Single File), turn OFF upLift Match Repair:

Turning this setting OFF in each project I receive helps stabilise files that for some reason cause Studio to crash. I am sure it helps with speed too.

If you want to know what any setting means under File > Options or under Project Settings, click the Help button bottom right of the settings window:

Keeping these settings turned on if you need them should work fine if you have a hi-spec fast computer and an excellent broadband connection. However, in less than perfect scenarios or with huge slow projects, it can help to turn one or all of them off.

If the above isn't enough, I also keep Fragment Matching turned off, here:

As most of my work is proofreading in Review mode, I don't need fragment matching turned on. I even have the Fragment Matches window closed in the Editor view.

I always have them all turned off until I need them, and Studio works well for me...

I hope this helps,

All the best,

Ali