My Napoleonic Wars wont work anymore.

So i got some mini mods that i put in my resource folder. They worked fine. But then i wanted to take them out so i took out my resource folder and put in a copy. Now whenever i start it the game  crashes and says Unable to open file Modules\Napoleonic Wars\ Resource\texture_gen_.brf

What do i do to get it working again?

If you have the game on steam, you could just validate your files / steam cache. (right click on game, properties, local, verify steam cache)