FS2004 (FS9) Interface, Settings & Tools Questions & Answers

FS2004 remains highly configurable, but modern Windows hides many of the files and display controls it depends on. This hub explains where FS9.cfg is stored, how to reveal its AppData folder, back it up, and let the simulator generate a clean replacement when settings become corrupted.

It also covers switching between full-screen and windowed modes, arranging multiple monitors, preserving aspect ratios, and dealing with permissions or compatibility settings that prevent changes from sticking. Answers written and tested by the Fly Away team distinguish safe configuration edits from tweaks that can cause display problems, with practical recovery steps when FS2004 no longer starts correctly.