After 3 weeks of trials and errors while traveling, the new u-blox gps receiver seems to be the cause of my crashes. When I run the older (2006) MS gps the program does not crash. Change over to the u-blox with same trip planned on screen to the u-blox and S&T will eventually crash. Sometimes immediately, sometimes it takes a few hours. I have done this test several times over past 2 days to be convinced it has to be in the u-blox gps. I have tried the u-blox with short (supplied) and long usb extension cords.
For now, my problems are over as long as I keep using the older gps.
Any suggestions or testing that might help would certainly be appreciated.