Selling my copy of TomTom Navigator 6... advice please!

[Maskey]

I've placed my copy of TomTom Navigator 6 up or auction on Ebay. Someone has just asked me if the product is "deregistered". According to this chap the license provided with the software is only valid for one install. I installed this over two years ago on a MDA Vario II. I still have the phone in a cupboard somewhere and haven't used it in over 18 months.

Can anyone shed any light on this as Google searches have been unfruitful. How do I deregister the license on my device ready for installation by the auction winner on their device?

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