I got a TomTom One 3rd edition for Christmas. I dowloaded the HOME program and all was fine. We then took a trip overseas and I purchased a UK map. Due to memory restictions, I had to remove the US map from the unit in order fit the uk map. I made my backup and put the uk map on the unit. Great. When I returned and went to put the US Map back on, TOMTOM asked if I wnted to upgrade my version HOME. After I did, My backup was gone and all trials to backup my uk map had errors...... I finally called TOMTOM, and they put another US/Canade map on my account. I still could't backup my UK map, but was able to remove it from my device. When I downloaded US map from TOMTOM into my account and put it on my device, It says "operation succesful" but my unit says no map found and contents of device show no map. WTF!!!!!!! How do I get the damn US/Canada map back on??? My wife is going on a trip tomorrow. please Help!!!!!!!!!!