Since I've installed Garmin Express I can only sync runs intermittently to Garmin Connect from my Forerunner 405. Goes without saying I never had this problem with ANT Agent and this is incredibly frustrating.
Today, for instance, I get a "Sync complete" message, but I know nothing has uploaded because of the short amount of time it took before I got a "transfer complete" message on my watch. And sure enough my latest run isn't at Garmin Connect. Nor when I go to try to manually upload a tcx file from C:\ProgramData\Garmin\GarminConnect\Forerunner 405\Upload\FitnessHistory is there any tcx file listed since the last time I ran, so the issue is between Garmin Express and my watch.
Any suggestions? How do I reinstall ANT Agent, which worked fine?