After upgrading my Google Earth to version 4, the "View/Show On Google
Earth" function of Mapsource does not work anymo the folders
appears there, but it is empty. Anybody know to bypass this problem,
not including the return to version 3?

I am using the cumbersome process of saving the routes/wpts/trks in GPX
format, open this file in "Gps Trackmaker" software and saving again in
KML format, which I open directly in Goggle Earth. I think that Google
version 4 uses a upgrade version of KML which MapSource does not
reckon.