Hi Pat,
I've bought the 2006/1 Version for my Nokia E60 (with GPS for 50 € on Ebay this january). Navicore offered a free update for all users of 2006/1 until 03/2007.

I got a new Serial-No and with that I could download my new version (only for Symbian S60 3. edition).
Then I needed to activate navicore on my Nokia E60 and the serial got logged to
the id of the phone and the id of the sim-card.

Like that it's very restricted and you could not use another serial etc.

Mark