Well, now that I am home I contacted TomTom .... took a few days to respond to me but a nice person gave me instructions on resolving the issue. There was nothing I hadn't done before and it did not initially work. \n\nSo I deleted everything on the device and my PC [except the maps] and reinstalled the application. \nThe device reported no maps and despite me adding them it still could not see them.\nSo I deleted everything once more and then copied the maps to the internal storage and removed the SD card. Looked for updates and downloaded a new version of the application.\nRestarted the device and it found another version of the application. Downloaded that, restarted and it found a third update for the application.\nDownloaded that and it worked! Bloody hell it worked. So my device is now functioning once more.\n\nTo ease the disappointment of my previous attempts, TomTom have graciously provided an updated verion of Europe maps to my account. Have downloaded them [2.8GB download] to my SD card and the whole device is now up to date and functioning.\n\nSuppose it will make an ideal backup should my Garmin ever fail in the US or my car in Europe!