I have had problems with syncing my 610 for the last 2 weeks
the error on home computer is re-authorisation required but my garmin swim has no problems syncing & my 810 is fine as well
I have been through most of the solutions - reinstalling software deleting & reinstalling the device
today I installed garmin express on a different computer it says it had sync the 610 but nothing on garmin connect
so the problem appears to be with garmin express
I would appreciate any advice: