Nokia :: How To Revert To Original Navigation Software On 6720?

I recently bought a Nokia 6720 Classic, and played with the navigation software. I particularly liked the function where the displayed map rotates as the phone rotates, so that the map north always points to true north.I then installed Ovi Maps 3.03, whereby the entire navigation software GUI changed, and the true-north-function disappeared. I never checked what software was previously installed, so I don't really know if I just installed a newer version of Ovi Maps, or if I installed an entirely new software. The original software did not have any links to LonelyPlanet or Michelin.I also made the mistake of selecting 6730 classic in the download menu on the Nokia site, since the 6720 was not listed. Could it be that the 6730 doesn't have a built-in compass, and that the software I downloaded therefore does not have the true-north function?

Looking in the Programs folder, I saw a Nokia Maps and an Ovi Maps (swedish), both version 3.03 (246) I uninstalled the Ovi Maps program and restarted the phone, but I still got the new Ovi Maps 3.03 when I selected the Maps menu on the phone. I haven't dared to uninstall Nokia Maps yet - should I try that? So my questions are

1) is there a true-north function on Ovi Maps?

2) if not, how do I restore the phone to whatever navigation software was factory-installed?