I have 2 ssd's that I have this sim on and experiment with the newest NVIDIA drivers. I have a 90hz overclock monitor. My system is a very powerful I7 using a GTX980ti GPU, but I can not get the option of above 60hz refresh rate as a choice in the video settings menu, even after changing the config file. I have deleted my user folder, manually put the refresh at 90 in my config file, etc. Every startup the game is windowed, no 90hz option and then keeps putting the config file back to 60hz. Please help.