Strange. When I do that, it shows all the Flight Sim plans I have saved in Documents\Flight Simulator X Files.

I did have problems at one point, but is was with the 777 for FSX-SE looking in the C:\Users\<username>\Documents\Flight Simulator X Files folder, instead of the C:\Users\<username>\Documents\Flight Simulator X Steam Edition Files folder. I'm not sure if I fixed it, or if it fixed itself. :-/