Cant get the Harrier to work

I downloaded the Harrier and copied over the files but it doesnt show up as a plane to choose from when I open the program. I copied the folder into airplanes......copied over the Effects folder and also the Gauges folder.

Please help if you can

If you loaded it correctly the chances are that it will show up under a different name.
Make sure the box where you choose the aircraft has a checkmark in "Show all Variations".