I've had to switch to Garmin Express from being a happy Connect user for years after Chrome dropped support for the plugin.
My first run sync OK, but my second run gave an "Error synchronising" the first time and wouldn't sync after that. I've deleted the
C:\ProgramData\Garmin\CoreService\Devices\<deviceid>\Sync
directory as suggested elsewhere in the forum, and now it does sync, but only the summary of the course appears - the tcx file is just 2KB (the last few runs re-appear in that directory and are 80KB to 500KB).
I can still see the course in map view on the 305, so I know it is there.
Is there anything I can do to recover it and improve my so far hit and miss experience of Express?
(System: Fully patched up to date Windows 7 64bit).