It's kind of an off topic but i use an easy way to upload from my 3790 --> 3490 the route i want tο MapSource directly from the device. After i create the route i want with Trip Planner or Search By Address or any other way, i turn the device to simulation mode and start the route i just created. While simulation is running i return to main screen (Where to ...) and i connect the device to PC, after the device is being recognized from Windows i open MapSource & choose to upload from device, in the opening options window i choose "Routes" and MapSource just uploads the simulating route. The thing is that the route has no name so in order to give the original name i just do a right click and select to reproduce the route. Ready !!

I don't know if someone else is already using this way to upload routes from his 3XXX device and post it somewhere, in that case i must have missed it and i apologise ...