I have a Garmin GPS 660 for my motorcycle. It is no longer supported by Garmin US or Australia where I live. It seems when I tried to update it using the official Garmin Express app, the Express erased my basic operating system software. A local electronic GPS dealer tried to reload the system softaware that they knew once was available at a garmin dot com site but that had been removed. Can anyone direct me to where I might find and download the system software for a 2011 Garmin 660? Thanks