Editor view or shortcut CTrl+F not working in Studio 2015

From yesterday, Editor view is disabled and keyboard shortcuts CTrl+F and CTrl+S don´t work. All other softeare/programs/Apps, do. I use Win 10.Nedd to work please. Thanks Paulo Eduardo

<SDLErrorDetails time="10/7/2016 10:28:53 AM">
  <ErrorMessage>Unable to find the specified file.</ErrorMessage>
  <Exception>
    <Type>System.IO.FileNotFoundException, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</Type>
    <FileName />
    <FusionLog />
    <HelpLink />
    <Source>Sdl.ProjectApi.Implementation</Source>
    <HResult>-2147024894</HResult>
    <StackTrace><![CDATA[   at Sdl.ProjectApi.Implementation.TermbaseApi.ProjectTermbaseProvider.GetProviderTermbase(IProjectTermbase projectTermbase)
   at Sdl.ProjectApi.Implementation.TermbaseApi.ProjectTermbaseProvider.GetTermbase(IProjectTermbase projectTermbase)
   at Sdl.TranslationStudio.Editor.Terminology.TermbaseViewer.TermBaseViewPartX.GetCurrentTerminologyProvider()
   at Sdl.TranslationStudio.Editor.Terminology.TermbaseViewer.TermBaseViewPartX.ActiveDocumentChanged(IDocument document)
   at Sdl.TranslationStudio.Api.Editor.DocumentEventHandler.Invoke(IDocument document)
   at Sdl.TranslationStudio.Editor.EditorService.set_ActiveDocument(IDocument value)
   at Sdl.TranslationStudio.Editor.EditorView.OnActiveViewPartChanged(IViewPartReference viewPartReference)
   at Sdl.Desktop.Platform.AbstractViewWithParts.Control_ActiveViewPartChanged(IViewWithParts view, IViewPartReference viewPartReference)
   at Sdl.Desktop.Platform.WinForms.DockingViewContentControl.OnActiveViewPartChanged(IViewPartReference viewPartReference)
   at Sdl.Desktop.Platform.WinForms.DockingViewContentControl.InternalActivateViewPart(IViewPartReference viewPartToActivate)
   at Sdl.Desktop.Platform.WinForms.DockingViewContentControl._tabControl_SelectedTabChanged(Object sender, SelectedTabChangedEventArgs e)
   at Infragistics.Win.UltraWinTabControl.UltraTabControlBase.OnSelectedTabChanged(SelectedTabChangedEventArgs e)
   at Infragistics.Win.UltraWinTabControl.UltraTabControlBase.RaiseEvent(UltraTabControlEventId id, EventArgs e)
   at Infragistics.Win.UltraWinTabControl.UltraTabControlBase.OnManagerSelectedTabItemChanged(Object sender, SelectedTabItemChangedEventArgs e)
   at Infragistics.Win.UltraWinTabs.TabManager.set_SelectedTabItem(ITabItem value)
   at Infragistics.Win.UltraWinTabControl.UltraTabControlBase.SetSelectedTab(UltraTab tab)
   at Infragistics.Win.UltraWinTabControl.UltraTabControlBase.set_SelectedTab(UltraTab value)
   at Sdl.Desktop.Platform.WinForms.DockingViewContentControl.AddViewPartTab(IViewPartReference viewPartReference, DockingViewPartLayoutInfo layoutInfo)
   at Sdl.Desktop.Platform.WinForms.DockingViewContentControl.AddViewPart(IViewPartReference viewPartReference)
   at Sdl.Desktop.Platform.WinForms.DockingViewContentControl.NotifyViewPartAdded(IViewPartReference viewPartReference)
   at Sdl.Desktop.Platform.AbstractViewWithParts.AddViewPart(IViewPartReference viewPartReference)
   at Sdl.Desktop.Platform.AbstractDockingView.AddViewPart(IViewPartReference viewPartReference)
   at Sdl.TranslationStudio.Editor.EditorView.AddDocumentViewPart(IViewPartReference documentViewPartReference)
   at Sdl.TranslationStudio.Editor.Shared.InternalEditorContext.AddDocumentViewPart(IDocumentViewPart documentViewPart)
   at Sdl.TranslationStudio.Api.Editor.AbstractInternalDocument.AfterLoad(IJob job)]]></StackTrace>
  </Exception>
  <Environment>
    <ProductName>SDL Trados Studio</ProductName>
    <ProductVersion>12.0.0.0</ProductVersion>
    <EntryAssemblyFileVersion>12.2.5141.6</EntryAssemblyFileVersion>
    <OperatingSystem>Microsoft Windows 10 Home</OperatingSystem>
    <ServicePack>NULL</ServicePack>
    <OperatingSystemLanguage>1033</OperatingSystemLanguage>
    <CodePage>1252</CodePage>
    <LoggedOnUser>HP_PAULO\HP-Paulo</LoggedOnUser>
    <DotNetFrameWork>4.0.30319.42000</DotNetFrameWork>
    <ComputerName>HP_PAULO</ComputerName>
    <ConnectedToNetwork>True</ConnectedToNetwork>
    <PhysicalMemory>8335212 MB</PhysicalMemory>
  </Environment>
</SDLErrorDetails>