It definitely screws up your desktop, and will probably screw up other games - so save your current settings as "current" or whatever you want, and save these settings as Il2:FB or whatever (theres an option to do it).
Right click desktop, click properties, go to settings tab, click the advanced button, Geforce(whatever) tab, color correction, and set the following(after saving current settings!):
Digital Vibrance: Medium (third tick from the left)
Brightness: 107%
Contrast: 135%
Gamma: 1.47
Save as..., click apply, then load up Il2:FB or Il2:FB AEP and see if you like it any better. It caters to my taste, so I don't expect anyone else to like it. Just FYI.
-SW