There was a patch to the Div: OS2 DE and since then I can't start it anymore. I get a white screen and after a while it crashes and an errormessage to Larian appears. I sent the message, but how do I get an answer if it is fixed?

Can I go back to the older version and if so, how?

I can play the 'classic version' without problems, but I'd rather play the group I'm over 60 hours into the game already.

I found out, how I can go back to the older version and I can play again.

how did you go back to the older version

Sorry, a little late for the answer.

There is an drop-down-menu-option in the GoG-Galaxy next to the 'play'-button. There you go tho 'settings'. Then there was a list of installed DLCs and Hotfixes. I could choose an earlier version of the game. I think, I had to disable the automatic updates, to do that.