Problem with viewing OGT's GPX files in MapSource

[TonyG]

I'm using the newest Open GPS Tracker by Rene de Groot to record my travels, hikes, and biking and kayaking trips. Everything works fine except that the stored and e-mailed GPX files (v. 1.1) cannot be read by the most recent version of Garmin's MapSource (6.16.1) (Error message: "xx.gpx" file could not be imported).

Has anybody run into a similar problem or have a workaround?

--TonyG