Game crashes after Gamma settings

[olividir]

So I did rename the menu_bg.mat (did not delete), then I deleted menu_bg.map_cache. I then renamed the barebone.mat file to menu_bg.mat and placed in the folder /main_menu/main/

Then I started the game, it loaded straight to the heart (after gamma settings), was there for about a second and then the game window closed. I did not touch anything while the game was loading.

I know this is not the most fun for you guys, so I really appreciate. I am sure the problem is so simple that no one thinks about it