Flight Simulator X... lost somewhere in my computer?

I installed flight sim x deluxe edition a little while ago and i exited it out and want to go back... except.. there is no shortcut button and its not under start and its not in program files.. dun dun dunnn.. any ideas? also i had all the graphics on high to ultra high running a nvidia 9600gs card w/ 768 dedicated vram and 8gb ram and amd 9850 phenom quad core processor and the graphics on the planes were terrible, the planes were turend to max settings too. thanks