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Even if the device wasnt registered, theres no harm in registering it now using your new email address.
With that being said, you need a usb data cable to update the device.. it looks like this http://amzn.to/1UToXtD
Also, you need to download and install the free magellan content manager software . as thats what you use to update the maps. You can download it from this page http://www.magellangps.com/contentmanager
If you have further questions, let me know.
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