To find your copy of X-Plane you can select "Add or Remove Scenery" in your X-Plane 10 Installer and you will see installed instances of X-Plane. The X‑Plane installer does not infest your hard drive with shortcuts and directories. Therefore, all it takes to uninstall the program is to delete the X‑Plane installation folder (located by default on the Desktop) by dragging it to the Recycle Bin or Trash. After you empty the Recycle Bin/Trash, the program will be removed completely from your hard drive.