Game closes to desktop when trying to change key bindings

Hi, honestly i had the same problem till now and i was searching for then i realized i can do this,

First u gotta use the highest res u got(prolly 1920x1080)

Make sure to ue it and also make sure there is no launch option for ur game launching, and also turn off read only from saved games file for videoconfig file, then when u launch just go in ur video setting and use 1080 res  then u can change keybinds, after that u can normally use all the things u had.