I logged into my account, selected the Maps drop down list, selected Update Maps. On the next screen click on the "blue Check for Updates button), next screen connects to your device. Mine says in blue, "GPS 20x Software Version 2.60" Click on those words, it Garmin will find the Serial number of your GPS and then the next screen shows (2) choices for updates. The first is "nuMaps Lifetime" North America, the second is "nuMaps Onetime".
Choose which one you want and push "add to cart"
The onetime version has a choice of download or order on CD. Hope this helps