This solution is rather crude... but it works, both ways; gpx to Topo! and the reverse. So far I have not found a more convenient way to get a track from TF to Topo! Topo! can import .gpx waypoints, but not tracks it seams.
But to this question, Topo to TF: Have Topo! create a route for any track you would like to transfer, hook the gps up, export the track or waypoints to the gps, and then import the the stuff in the GPS into TF.
Did I mention crude? Â
It works better going from TF to Topo! Use the active directory in the GPS, because it can store a huge number of points, as opposed to the saved tracks directory. Â
I'm waiting for an easy to use converter. Last time I checked, GPS Babel could not do Topo version 4.x
Larry