Change user name of a registration key


I have just registered 3 copies of SmartFTP for my company. The heading
of the key is this:

ID: 400001621
User: Luciana Ferrari
Company: Comune di Modena
Version: 1.0
Number: 3.

I suppose that the user name has been taken from the name written on
the credit card used for the payment, but this is not good for me because
it is the name of the purchase department manager of the company (the
only authorized to use a credit card). I'd like to change the user name
substituting it with the company name. Is it possible?

Thanks a lot for the help.
Stefano Gibellini