I have the same problem and just started yesterday. I load the program all ok then when I press the yellow tab FLY , the blue load line at the bottom of the screen gets three quarters across the screen then it locks up. Need to do a program reset CTL-ALT-DEL to clear the screen.
I have removed any 3rd part software.
I have set the program back to DEFAULT settings
I have reinstalled the software TWICE but still the same issue.
I have run the Windows repair script
I am not using steam.
Any thoughts/actions needed ??.