Multiple "batch" conversion

[Zava]

My tool of choice for operations like this is GPS Babel, just make yourself familiar with its options.

Thank you Hans,
in my limited knowledge of GPSBabel, I can see a way to translate a route into a track, but can I translate 200 routes into a (single) GPX track? Or at least into 200 separate gpx tracks?
In the meanwhile I found a handy way: you can load hundreds of gpx routes into WINGDB3, then start a "preview", which opens MapSource and asks for permission to treat routes as tracks. As a result, MapSource is opoened and loads all routes as tracks and can save them as a single gpx file containing tracks (not routes).
In the end, quite handy.