I just went out and checked mine. When I press connect it shows the number 888-244-4529,it dials and connects. Then it says "MapQuest has sent you the destination "_________". Do you want directions? If I say "yes" after a few seconds it comes up with the GPS screen and I can set that as the route.
I was looking through the guide and can't find a way to like go back and redownload a destiation.