Thank you for reporting the issue with the game.
I would suggest navigating to your %LOCALAPPDATA% folder and looking for a folder named HoroxAlptraum.
Please delete it (= HoroxAlptraum) along with its contents and then try the Launcher again.
If it’s only related to some metadata or something similar, you could try reinitializing it first.
Let me know if that works? :)
