It is strange, seems to be odd performance for a lot of people. I did have better performance before the patch.
I’ve just installed the patch from this thread and I’m now getting constantly over 40fps Highonsnow Glass Cockpit 15-19 FPS boost on Airliners and 10-21 FPS on GA Aircraft
I’m also running Air manager and littleNavmap. Having been using littleNavmap for a while when flying in XP11