Yeah, that's really strange. Yesterday, I had this update screen after I hosted a new game. Right after that, all settings were reset to default.
I just noticed that I have a game.pref BAD file and a TEMP file from yesterday next to the actual pref file. So, I just copied everything from the temp file into the pref file, and now everything is back to normal. I can also rotate the templates with the mouse again, even though the option isn't in the settings. ... I don't really get it all