|Videos showing and explaining in details the features of GpsarPro are just available here :|
Chapters are as follows :
 GPS track data loading
 Import data from GT-11 or GT-31
 Filter and adjust a track
 Using speed-graph
 View 2D settings
 Managing several view windows
 Main Tool buttons
 Speed performances & send to server
 Calibrating a map
 Map auto creation/calibration from internet
 Define and Observe a Regatta
Chapter  is dedicated to GPS-SpeedSurfing users, with the whole procedure to compute results, send them to GPS-SS, and then edit and validate them once on GPS-SS.
Chapters come both in English (sorry for my limited english skills) and French voice versions.
If you think some more chapters are still missing, please tell me, I'll make them.