I did download GE and works for me. I buzzed my house at about 1000 knts in the F-16. I think I broke some windows...
From the instructions copied on the help screen:
'To enter the flight simulator mode, press Ctrl + Alt + A. Once you have entered flight simulator mode for the first time, you can re-enter the mode by choosing Tools > Enter Flight Simulator.'
Keep fiddling with it and good luck,
David