Since updating my 610 to firmware 3.0 and updating GE to 4.0.13.0 - done at the same time.
My 610 will not sync anymore.
1. It did request me to log in halfway through the sync but failed with a message "there was an error syncing with garmin connect"
2. after deleting the sync folder as requested by another https://forums.garmin.com/showthread.php?226548-Garmin-Express-There-was-an-error-syncing-with-Garmin-Connect still fails
3. I have tried to re-pair the device still fails
4. i did a manual upload of one activity which worked but the second time caused the watch to continually to reboot
please help... BTW you really should put the manual sync button back on GE- uploading one activity at a time is a waste of time.... - why did garmin remove it in the first place??????