Black screen (DOF) depth of field

Hey , guys
so i messed up with the game and ignored the warning message and maximized my DOF …after that i deleted the lua folder and the settings folder from garry’s mod
and now i get black screen when i start any gamemode (the game is working i just can’t see anything) :l I also tried to add launch options like -dxlevel81 …nothing
i also have a bad connection and don’t want to download it again and i’m not sure if steam cloud is gonna backup or no

Verify integrity of game cache, it will only redownload files you have deleted