your license is transferable to any version so it should work just like normal. when i upgraded to v 2.0 i still have my full navigation. in the menu go to the license menu and acquire your license. i cant remember exactly but its there so just search around for it.
yeah many people had to keep retrying the license menu numerous times before it finally found their subscription. its a known issue with v2.0. keep trying a few more times, and call nokia if it finally doesnt work.