Did you go here? "C:\Users[Your User Name]\AppData\Roaming\The Creative Assembly\Rome2\scripts" and delete user.script.txt and preferences.script.txt. If you don't have user.script.txt, you're okay; that's a file some mods need, and others do not. Also delete the savegame folder within the rome 2 folder in that same area. Also make sure you delete all mods, not just untick them.