Or follow direct download link:
Rename file to 006B055303.GCD and copy to Garmin\RemotSW folder.Code:http://www.garmin.com/software/FirmwareUpdateforzumoBluetoothModule_GCDfile__340.gcd
I do not think what launching together FW updates for unit and his moduls is good idea from Garmin team. Lots of my head ache on earlier stage I have after similar attempt!