I'm a backer. I've actually been following Ragnar for quite some time before DFC was announced remembering he promised to continue the story.
Unfortunately GOG patch is not up and humble is having a a 3 GB download of the entire game instead of a patch, so you'll have to wait till tomorrow most likely.
Crowboy, I have a feeling that the root cause is the same - an incompatibility between a patch and a saved game.
Can you uninstall and reinstall DFC and try that? It won't affect your saved games.
I had this issue from before the patch. Patch just didn't help solve it. I've tried to play from start. Still crashes...