Hello, the first time I downloaded and started Coromon it worked. I went to the options and enabled fullpicture mode and since then the game was only black. Equal if I uninstalled it with all local saved setting and reinstall it, equal if I install the gog version or the offline version - it can't start. I even tried to start it as admin or with "compatible mode" and even this doesn't work.

I was so excited to play coromon and now I can't.

Hope anyone can help me, thank you very much!

This seems very weird. I recommend uninstalling the game with Geek uninstaller. Sometimes there are hidden settings left that the regular windows uninstaller doesn't get rid of.