Please make a copy of your old version for backup.

[LoBiSoMeM]

Originally Posted by CaptainDoggles

Decrease your graphics settings maybe.

A lot of folks forget what it was like when the original IL-2 was new, and the engine was so demanding that we couldn't fly over cities without getting severe frame rate hits.

+1000. I'm uploading a small video with settings in "Very High" and with "custom" settings. The game visual is almost the same, but with MUCH BETTER performance!