Default Moving serial number?

I bought a used O2 XDA-1 since my old T-Mobile MDA-1 fell to the floor (other thread).
I believe to recall that the old MDA-1 I had was unbranded (hope I find that CD again which the seller gave me at the time I bought it).

Otherwise I would need help from the forum.

Would it be possible to move all my software plus the ID of the phone to the new one?
I have a somewhat older TomTom bound to it and a Tunelab piano tuning license.

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TIA

Christoph