Another useful feature I found today!
When organisers provide a .gpx file it makes using the GPS a doddle
This gives a fully working .gdb trace (with some additions to avoid ambiguities) but if you then want to get an idea of climbing or view on a proper map, loading the .gpx into Memory Map doesn't give a very good track as there are too few waypoints.
If you let ITN convert the .gdb file back to a .gpx it handily expands the number of waypoints, giving a much better track.
For example, Manotea's Anfractious .gpx file has 92 points - the expanded .gpx has 738 - a useful increase!
BTW - it isn't obvious in Mapsource but if you select all the waypoints in the .gpx track and right click you get the option to make a route out of the waypoints.
Only discovered that after spending ages tracing out routes over the track points!!