That's 3.2.1 stable on Windows 10.
And after restarting it works again... sorry for the fuss, let's hope that was an exception : )
By the way, you don't happen to know how I could paste a folder with a complete project into another project (in Windows) while keeping its inherent dependencies? The FileSystem updates them but they always loose their functionality.
EDIT:
Well, it appears that the issue keeps occurring every now and then, especially when trying to "import" other projects. I'll address this in a separate question.