Trados 2017 new install: SDL Plugin Management not open, Error when installing plugins manually

Hi everybody, 

on my new SDL Trados 2017 installation the SDL Plugin Management is not starting. I can't install *.sdlplugin files with a double click and also can't install plugins manually via the folder C:\Users\<user>\AppData\Local\SDL\SDL Trados Studio\14\Plugins\Packages.

 

I get an error message in Trados when trying to use this plugin (message below).

I am administrator of the computer, tried the repair function and reinstalled everything. Also with deleting the existing folder under AppData (because they remain after the deinstallation).

 

 

All hints are welcome.

Thanks, Markus

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<SDLErrorDetails time="22.11.2016 16:42:59">
<ErrorMessage>Der Objektverweis wurde nicht auf eine Objektinstanz festgelegt.</ErrorMessage>
<Exception>
<Type>System.NullReferenceException, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</Type>
<HelpLink />
<Source>Sdl.Community.StudioMigrationUtility</Source>
<HResult>-2147467261</HResult>
<StackTrace><![CDATA[ bei Sdl.Community.StudioMigrationUtility.Services.StudioVersionService.CreateStudioVersion(RegistryKey studioKey, String version, String publicVersion)
bei Sdl.Community.StudioMigrationUtility.Services.StudioVersionService.FindAndCreateStudioVersion(String registryPath, String studioVersion, String studioPublicVersion)
bei Sdl.Community.StudioMigrationUtility.Services.StudioVersionService.Initialize()
bei Sdl.Community.StudioMigrationUtility.Services.StudioVersionService..ctor()
bei Sdl.Community.StudioMigrationUtility.Integration.StudioMigrationUtilityViewPartAction.Execute()
bei Sdl.Desktop.IntegrationApi.AbstractAction.Sdl.Desktop.IntegrationApi.Extensions.Internal.IAction.Execute()
bei Sdl.Desktop.IntegrationApi.Internal.Adaptors.InternalActionAdaptor.Execute()
bei Sdl.Desktop.Platform.Implementation.CommandBars.ActionService.<>c__DisplayClass3.<ExecuteAction>b__2()
bei Sdl.Desktop.Platform.Implementation.Services.Log.Resources(Object message, Action action)
bei Sdl.Desktop.Platform.Implementation.CommandBars.ActionService.ExecuteAction(IAction action, ActionOrigin origin, Boolean allowToggle)
bei Sdl.Desktop.Platform.WinForms.IgCommandBarAction.Execute()
bei Sdl.Desktop.Platform.WinForms.IgCommandBarAction._lazyButtonTool_ToolClick(Object sender, ToolClickEventArgs e)
bei Infragistics.Win.UltraWinToolbars.ToolBase.OnToolClick(ToolClickEventArgs e)
bei Infragistics.Win.UltraWinToolbars.UltraToolbarsManager.OnToolClick(ToolClickEventArgs e)
bei Infragistics.Win.UltraWinToolbars.UltraToolbarsManager.FireEvent(ToolbarEventIds id, EventArgs e)
bei Infragistics.Win.UltraWinToolbars.ToolBase.OnToolClick()
bei Infragistics.Win.UltraWinToolbars.ButtonToolUIElement.DoClickProcessing(MouseEventArgs e)
bei Infragistics.Win.UltraWinToolbars.ButtonToolUIElement.OnMouseUp(MouseEventArgs e)
bei Infragistics.Win.ControlUIElementBase.ProcessMouseUpHelper(Object sender, MouseEventArgs e)
bei Infragistics.Win.ControlUIElementBase.ProcessMouseUp(Object sender, MouseEventArgs e)
bei Infragistics.Win.Utilities.ProcessEvent(Control control, ProcessEvent eventToProcess, EventArgs e)
bei Infragistics.Win.UltraWinToolbars.UltraToolbarsDockArea.OnMouseUp(MouseEventArgs e)
bei System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
bei System.Windows.Forms.Control.WndProc(Message& m)
bei System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
bei System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
bei System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)]]></StackTrace>
</Exception>
<Environment>
<ProductName>SDL Trados Studio</ProductName>
<ProductVersion>14.0.0.0</ProductVersion>
<EntryAssemblyFileVersion>14.0.5746.0</EntryAssemblyFileVersion>
<OperatingSystem>Microsoft Windows 10 Pro</OperatingSystem>
<ServicePack>NULL</ServicePack>
<OperatingSystemLanguage>1031</OperatingSystemLanguage>
<CodePage>1252</CodePage>
<LoggedOnUser>xxxxx</LoggedOnUser>
<DotNetFrameWork>4.0.30319.42000</DotNetFrameWork>
<ComputerName>xxxxx</ComputerName>
<ConnectedToNetwork>True</ConnectedToNetwork>
<PhysicalMemory>33427764 MB</PhysicalMemory>
</Environment>
</SDLErrorDetails>
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX