Why not Garmin Basecamp or Garmin Mapsource (version 6.16.3 is the latest)? Mapsource has a less steep learning curve and is a good tool to manipulate tracks (split, invert, etc.).
First install Basecamp, then Mapsource. Installed maps are 1:1 visible in both programs.
Mapsource is available from: http://gawisp.com/perry/mapsource/