Download the zip fie first load up xbmc scroll to the right you will see the system then settings once your in settings click on addons and then select install from zip file. Once you done that you need to tell it where you downloaded the navi x zip file so normally it should be in the downloads folder once you have found it click on it and it will install. Now once installed all you need to do is go to programs on xbmc and start navi x enjoy.
Device 1 LG G2 32gb white
Device 2 Sony Z Ultra 16gb black
Device 3 IPad air 16gb silver