Hi need some expert advice. I downloaded the Nav Desk software for my mac and proceeded to connect my husbands gps to it. It not only hasn't downloaded any new updates it has erased my map data! I have lifetime maps. I can't even do a restore of a back up because it was the first time I connected it to my mac. I'm at my wits end. This is the second Navman that has crashed and burned for me. I love my Garmin just connect and it downloads! .... how can I restore it? Please help as Navman support is no help! It's just a month out of warranty.