Missing files Groove Agent SE after update and/or installing packages

GAse 5 is a mess here. When I try to load ‘The Kit’, I get a missing file alert, like over 8000 samples are missing. One of them for the kit is 157 I think.
I locate and scan for it, and try to put it in the library, and I get a ‘no action taken - the file is already in the library’ message.
I tried to scan the whole C drive for the missing files, and I get a complete lockup, have to use task manager to shut down, and then have to start cubase in ‘safe mode’.
I’ve pretty much given up on Groove Agent.