Just got the game today and started it up, but the menus don't display properly. There is no background to them so they are essentially unusable. Here is a screenshot:
http://abload.de/img/2015-05-22_00001ufops.jpg
So far I've tried redownloading the game from Steam twice (deleting user directories and what not), running it windowed (had to change it to that via ini), and turning the Gel UI thing on and off. Drivers are of course up to date.