Hello,
After digging around a bit, I found out how to import a .tcx file to the modern interface in Connect.Garmin.com.
Left Hand edge of screen, click on the top tab (3 bars),click activities, then on right hand side, click the "Import" hyperlink.
I followed thru the prompts, selected the .tcx file using the "browse" button, the clicked "Upload Activities" button. Nothing appears to happen, no spinning timers or nothing. I can click on the "Close " X and the windows closes with nothing imported.
I can import happily by using the "Classic interface, temporarily".
Anybody else seen this? Garmin??
...Brent...