My 645 (non-music) froze on the first run after the update to 3.30. See attached error-log.
I was using the back to starting point function (straight line) while this happened. The watch never froze before,
One thing that you can try is to connect the device to a Windows computer and see if it is recognized by the computer as being plugged in. If so you can open the Primary Drive>Garmin Folder>NewFiles and delete any files in that folder.
If that doesn't work we would need to speak with you directly to investigate this. You can contact our Product Support teams through our chat, email, or phone channels for direct assistance.
So far only the sensor hub update has installed on my 645 and GCM isn't showing the new FW doing a background transfer via BT. I tried using the Web Updater on my ancient Mac Mini (it's too old to run Garmin Express) and get server error messages. Anybody else not getting the update yet?