When nothing's checked that means no change so that's alright, can't go in game atm but for the gradients I'd recommend going into advanced then Gradients should be somewhere, just click the box. For the crash problem, it might be a pc problem, all the settings that are loading all at once may crash your pc as it's probably a big charge or something. Don't really know how to fix that except for buying a new computer? but I'm pretty sure there will be another solution