I tried the tool to convert a track I had saved in MapSource into a route. MapSource couldn't read the resulting GPX file with the route.
Can you please trie to open the file with this online-Tool: Trackviewer
@DiSiGot: The tool ist only available in German, but the text is not so important. It requires a gpx-File and converts every route in the file to a track and every track to a route, thats all!
Chris