I have desinstalled and installed Studio2021 and then used CCleaner. I shut down Studio and then executed WorldServerComponents_16.5.1747.msi. The error msg. prevailed on opening Studio: "Method not found: SDL.core.PluginFramework.IPluginRegistry SDL.Desktop.Platform.IStudio.get_PluginRegistry()".

SDL WorldServer Package Converter and WsXliff-filter are both checked in the Plug-ins tab. Studio2021PLUS is of current version. Any idea how to get that package unpacked with this error message permanently displayed? The WorldServer Package App has the latest version no. I sadly use WIN 7, shying away from migration to WIN 10 but I will have to do this sooner or later, I guess.