To my knowledge, this is part of Khaled's attempt to ensure that all licenses are used by a single user only.

I would imagine that you could request the information be changed by writing to Khaled at

I would recommend that you include your current registered name and the e-mail address that you used when you registered your copy of mIRC.

I'm not going to recommend that you include the registration code in an open e-mail, but you should be prepared to send it as well if you are requested to do so.