Error "Key already exists" - Trados Studio 2024 won't launch

I upgraded from 2022 to 2024. It worked for a few days, but ever since my computer had to restart (power outage), I haven't been able to launch Studio 2024 anymore.
Error message is "Key already exists"

I tried uninstalling plugins as it seemed to be the solution to this error, but to no avail.

What could be the problem?

<Exception>
<Type>System.ArgumentException, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</Type>
<ParamName>Key</ParamName>
<HelpLink />
<Source>Infragistics4.Shared.v23.2</Source>
<HResult>-2147024809</HResult>
<StackTrace><![CDATA[ à Infragistics.Shared.KeyedSubObjectsCollectionBase.ValidateKeyDoesNotExist(String key, IKeyedSubObject ignoreObject)
à Infragistics.Shared.KeyedSubObjectsCollectionBase.ValidateKey(String key, IKeyedSubObject ignoreObject)
à Infragistics.Win.UltraWinToolbars.RibbonGroupCollection.AddGroupHelper(RibbonGroup group, Int32 index, Boolean notify, Boolean validateKey)
à Infragistics.Win.UltraWinToolbars.RibbonGroupCollection.Add(RibbonGroup group)
à Sdl.Platform.UI.IgRibbonGroup.Create(INativeCommandBarItemCollection nativeCommandBarItemCollection, Int32 index)
à Sdl.Desktop.Platform.Implementation.CommandBars.SubCommandBarItem.Create(INativeCommandBarItemCollection nativeCommandBarItemCollection, Int32 index)
à Sdl.Platform.UI.IgRibbonTab.UpdateCommandBar(Boolean force)
à Sdl.Platform.UI.IgRibbon.UpdateCommandBar(Boolean force)
à Sdl.Desktop.Platform.Implementation.CommandBars.SubCommandBar.UpdateCommandBar(Boolean force)
à Sdl.Desktop.Platform.Implementation.CommandBars.SubCommandBars.Update(Boolean force)
à Sdl.Desktop.Platform.Implementation.CommandBars.SubCommandBars.set_VisibleInParent(Boolean value)
à Sdl.Desktop.Platform.AbstractView.Activate()
à Sdl.Desktop.Platform.Implementation.StudioWindow.Init(IEventAggregator eventAggregator)
à Sdl.Desktop.Platform.Implementation.Studio.CreateWindowInternal(IEventAggregator eventAggregator)
à Sdl.Desktop.Platform.Implementation.Studio.Run(ISplashScreen splashScreen, IPluginLoaderService pluginLoaderService, ICommandLineParsingService commandLineParsingService, IUserSettingsService userSettingsService, IEnumerable`1 startUpActions, ILicensingService licensingService)
à Sdl.TranslationStudio.Application.Launcher.RunApplication()]]></StackTrace>

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