Fullscreen Problem(Cannot use fullscreen option)

[bugmenot]

You can't adjust the res. - it's a broken option and does not function (for most people). Use default res, fullscreen option, and "save ge to texture" for the best fullscreen experience.

Ah I see, thanks.

But I tried that setting and got... gray screen instead of black, with no way to do anything except quit. so I guess I'm out of luck?

Edit: turn out right clicking is working fine, thank you for your help!