Yeah once you have got it you register on the garmin site,
You will get a free update when you log on & I THINK one in a years time, just read the bumf on the web site
I cheated & got my kids to get the lifetime upgrades as a birthday prezzie, and it puts something on your PC that checks for updates regularly & then tells you if there is one or not
The lane assist is fab & also the little icon that tells you the road speed limit, just for those stupid roads where you would expect it to be 60 & its down to 30