I use MapSource to view GPS topo maps, and use the View option 'View in Google Earth'. That stopped working with GE Pro version 7.3.3, giving an error in MapSource indicating that GE was not installed, when in fact it is. I can downgrade GE to 7.3.2 to get the link working again, but GE automatically updates, breaking the link. What alternative GPS mapping programs are out there that link to GE and have functionality equivalent to MapSource?