The flight simulator 2004 (FS9) are awesome. It's a standard for old AHS (Advanced Hardware Support) machines and using to low end machines useful for Windows XP and Windows 7 and very useful for saving data on hard disk storage, including new machines with Window 10/11 or even Windows 7 on virtual machine under Windows 10/11 Host. The FS9 there hosting for FS9 mods (airplanes, scenerys, etc) served.
Recommend preserve it!