So, to fix this, go into your main game directory, run the 7Dlauncher, click Tools (from here, if you would be so kind, I would like a copy of your registry for debugging. If so, click Open Game Settings, right click the 7 days to die folder (left-hand side), click Export, then upload it somehow to me in a private message, if not, no biggies!), click Open Settings, find the 7 days to die folder on the left-hand side, then delete that folder. You will need to make a new profile and change your settings and such again, but that should get you going.