The instructions for how to use Google Earth to create SkyView User Waypoints can be found at
http://wiki.dynonavionics.com/SkyView_User_Waypoints
Note that waypoints MUST be "placemarks" withing Google Earth, and the must be in a folder called "Dynon".
You might be able to convert other formats, such as the .gpx file that is in your zip file into a file that Google Earth can read by using the tools at http://www.gpsvisualizer.com/map_input?form=googleearth. Depending on how the waypoints are packaged in the gps file, they may or may not convert to placemarks.