How do I restore the game folder to its “factory settings”? Auto-translated

I downloaded the Heroes Might & Magic 7.5 mod with the ice race and demons (version 1.17, I think). It seems like something was installed incorrectly, as every time I launch the game, I get these errors for all the game's resources (screenshot). I don't know if it's related, but when I tried playing the campaigns, I couldn't enter the city at the beginning of the missions and teleport into it. I decided to delete the mod, and I uninstalled and reinstalled the game in Uplay, but the mod remained. Can you help me clean up the game's folder contents?