Hi. I have FS9 and FSX on my PC, each installed under a different user account. Does anyone know if it is possible to set things up so that when I am logged into the FS9 account, ***.flt files open with FS9.exe when I double-click on them, and when in the FSX user account with FSX.exe?Thanks,Martin

I do not think what you want can be done. But you can right click the flt file, and select Open With, and you can select FSX or FS9 from the list (once they are opened at least once with a version of FS, that version will show in the list).