Update has deleted the USA/Canada & Europe Maps on my SD card. I am travelling in the USA and so am now screwed! I cannot get download to choose only the USA/Canada map. It is trying to download 28 hours worth of maps! Trouble is I have to be out of this hotel in 3 hours and without the GPS I have no idea how to get to my next hotel! I would download the USA only map (I have frre lifetime world maps) but I cannot get it to do that.