And when I try to validate game files now, I get the message that one file is incorrect and needs to be re-downloaded (it has file size 13,4 MB), but doing so does not fix the problem.
Before starting game after purchasing Crusade DLC today, I verified game files, disabled mods in-game, and then deleted all previously installed mods in the mods folder. Then, game launched fine, and I started using the Civilization Designer. I noticed that extra backgrounds, leader Pictures, logos and such from priorly installed mods (found at Nexusmods.com ) were still there, so I started using them. Suddenly, after about an hour where everything worked fine, almost all backgrounds, leader