Draw or select the 3 parts of a one gpx file

Hello I have a gpx file ( from T.E.T bulgaria ) it’s a one file but contains 3 differents parts. most softwares draw the whole track, but I can only have the first part here. how can I do to have all parts or select one of the three… ?
you can test the gpx , which is on this page


thanks for your help
Fab.

Please try to convert to GeoJSON or KML and try again. The uploader function doesn’t really have priority for us, sorry.