Appreciated for this - I did make an initial attempt and the unit does react differently, shows 'loader' on screen. Also, it tried to do the update - but the Updater says 100%, 0:00 remaining but after a few moments it uts up error screen and says to call Garmin support but give no info on error type/code....

But at least I do have some progress and have access to the tools to do this if at all possible....