Precision Flight USB CAT II and X-Plane 9 - Manual (Page 5)

USB CAT 2 BATD and X-Plane 9 with Windows 7 Setup Guide Page 5
4. Read the license agreement. You will need to Accept the agreement to be able to use
the plugin. Once you have agreed click on Next.
5. This explains that the plugin will be installed on the default location of C:\X-
Plane\Resources\plugins. If you did not install X-Plane in the default directory above
you will need to point the installer to that location in the next step.