I recently bought a map of France for a trip I was going on. I backed up my USA map on my computer before I left. I'm now back and I want to put the USA map back on my GPS. However, in TomTom Home, there is no option to allow me to put the USA map back on my GPS. It shows the map on my computer, but it won't let me send it to the GPS. I have enough free space on my GPS. Any suggestions?