Video settings reset [ Edited ]

[HazardManiac]

Hi there, I tried changing my config file so I won't have muzzle flash and I did something wrong(apparently). Sice then, every time I start the game, my video settings reset. I tried removing the game and all files of it and reinstalling, but that didn't seem to work. Does anyone know how to fix this problem? And can anyone help me change my files the right way to reduce/remove muzzle flash?

Thanks in advance.