Garmin GNC 255A S/W v. 2.02

Getting ready for first flight on RV7 project. I would like to refresh the SW on my GNC 255A currently v2.02. Where can I d/l the software? I believe the current version is V2.20 as indicated in Garmin notice 1756A_ASDN.

Thanks;

Garmin GNC Radio

Nothing on the software? Garmin are you monitoring this forum still?

Software updates for "certified" equipment is generally only available thru Garmin dealers, it is only available from the dealer web portal. The only exception I'm aware of is the GTN software which they have made available to EAB customers.