It works now with the admin account of Win 10 Pro. Either it is the admin account or the browser. Because, with my user account I have Brave browser as the standard browser which is not supported by vortex. With the admin account it's Edge. I also tried (at the user account) to start Vortex with admin rights, but that did not work either. Maybe the admin rights for the main program do not apply to the implemented library programs? Anyway, although I have to use the admin account, I am happy to be able to play my favorite again :thumbsup: €: I think the culprit was a junction link for the user data (appdata/roaming). Vortex seems to have problems with junction (virtual) links under appdata..