I tried to upload an activity last week and when Garmin Express saw my device (910XT) it told me I needed to update it, so I followed the instructions and did so (I think to firmware 3.20). Now it won't upload any activities. So I tried installing Express on a different PC and plugged in the ANT stick, it gets so far in the installation of my 910XT, I sign into Connect, it goes to "please wait while we finish setting up your device", the progress bar gets maybe 1/4 of the way across and that's as far as it goes, it just stops doing anything and stays there. All the while the 910XT shows "transferring data".
I've uninstalled and reinstalled multiple times always with the same result.
Any ideas?