When starting up Trados Studio 2017 this morning, I just get an error message ("L'index se trouve en dehors des limites du tableau"). Studio does not open. Yesterday, everything worked perfectly. How can I solve this problem ?

Error details :

<SDLErrorDetails time="07-12-17 08:08:31">
  <ErrorMessage>L'index se trouve en dehors des limites du tableau.</ErrorMessage>
  <Exception>
    <Type>System.IndexOutOfRangeException, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</Type>
    <HelpLink />
    <Source>Infragistics4.Shared.v14.2</Source>
    <HResult>-2146233080</HResult>
    <StackTrace><![CDATA[   à Infragistics.Shared.SparseArray.ValidateIndex(Int32 index)
   à Infragistics.Shared.SparseArray.GetItem(Int32 index, ICreateItemCallback createItemCallback)
   à Infragistics.Win.UltraWinGrid.RowsCollection.InternalTraverseRowsHelper(UltraGridBand band, IRowCallback rowCallback, IRowsCollectionCallback rowsCollectionCallback, Boolean recursive, Boolean includeTemplateAddRows)
   à Infragistics.Win.UltraWinGrid.UltraGridColumn.CalculateMaxCellTextWidth(Int32 maxColWidth, RowsCollection rows, Int32 nRows, Int32 maxRowsCollections, AutoResizeColumnWidthOptions options)
   à Infragistics.Win.UltraWinGrid.UltraGridColumn.PerformAutoResizeHelper(RowsCollection rows, Int32 nRows, Boolean applyWidth, AutoResizeColumnWidthOptions options, Int32 maxRowsCollections)
   à Infragistics.Win.UltraWinGrid.UltraGridColumn.PerformAutoResizeHelper(RowsCollection rows, Int32 nRows, Boolean applyWidth, Boolean includeHeader, Boolean includeCells)
   à Infragistics.Win.UltraWinGrid.UltraGridColumn.CalculateAutoResizeWidth(PerformAutoSizeType autoSizeType, Boolean includeHeader)
   à Sdl.TranslationStudio.ProjectManagement.FilesView.FileDetailsViewPartControl.RefreshContent()
   à Sdl.TranslationStudio.ProjectManagement.FilesView.FileDetailsViewPartControl.set_Files(IProjectFile[] value)
   à Sdl.TranslationStudio.ProjectManagement.FilesView.FileDetailsViewPart.Refresh()
   à Sdl.Desktop.Platform.AbstractViewWithParts.Refresh()
   à Sdl.TranslationStudio.ProjectManagement.FilesView.FilesView.Refresh()
   à Sdl.Desktop.Platform.Implementation.StudioWindow.OnInitialized()
   à Sdl.Desktop.Platform.Implementation.StudioWindow.Init()
   à Sdl.Desktop.Platform.Implementation.Studio.CreateWindowInternal(Boolean setActive)
   à Sdl.Desktop.Platform.Implementation.Studio.Run()
   à Sdl.TranslationStudio.Application.Launcher.RunApplication()]]></StackTrace>
  </Exception>
  <Environment>
    <ProductName>SDL Trados Studio</ProductName>
    <ProductVersion>14.0.0.0</ProductVersion>
    <EntryAssemblyFileVersion>14.1.6413.8</EntryAssemblyFileVersion>
    <OperatingSystem>Microsoft Windows 10 Famille</OperatingSystem>
    <ServicePack>NULL</ServicePack>
    <OperatingSystemLanguage>1036</OperatingSystemLanguage>
    <CodePage>1252</CodePage>
    <LoggedOnUser>ACER-R-MAN\R-Man</LoggedOnUser>
    <DotNetFrameWork>4.0.30319.42000</DotNetFrameWork>
    <ComputerName>ACER-R-MAN</ComputerName>
    <ConnectedToNetwork>True</ConnectedToNetwork>
    <PhysicalMemory>8320244 MB</PhysicalMemory>
  </Environment>
</SDLErrorDetails>