Need help! Anyone have Garmin Astro 220 older US- firmware? New US- firmware (3.7) rendered the radio operating distance unoperable here in Europe. I think this was done deliberately by garmin. Before the distance was 1-1.5miles in thick terrain but now just 300-400yards and the dog signal gets lost. We would have to downgrade the firmware to get the radio power back to normal. Now the unit is not usable for our dogs.

Could only find the 3.7 firmware so far...