I can't save my graphic settings

[HXArdito]

Do you have Game optimisations on in nvidia GeForce experience? It will always change your settings. Or your useropt.cfg file to write protected?
Also, it could be related to this:

[BUG LOGGED] Settings do not stick since SU5

As some of us have found out in another forum, it seems that if you have your graphical settings on ULTRA you are actually not on ULTRA but on a lower quality setting. You can test this at EGNX runway 27. If your settings are really on ULTRA you would see windows and other details on the right-side white buildings. If you don’t see these details, you’re not on ULTRA, even when your GUI indicates you are. There is a temporary workaround. Load a flight, click ESC and go to GENERAL OPTIONS → GRAP…