No good asking here. Email Blitz Research about it.
I gave my copy of BlitzPlus to my nephew and niece a while back and just sent Blitz Research an email explaining the situation to them and asking for a new BUID account (I had registered the purchase with my existing account and couldn't see any way of transfering it). James (Blitzsupport) emailed me a new BlitzPlus BUID and deleted the old one so I could set up an account for my nephew and niece.
I gave my copy of BlitzPlus to my nephew and niece a while back and just sent Blitz Research an email explaining the situation to them and asking for a new BUID account (I had registered the purchase with my existing account and couldn't see any way of transfering it). James (Blitzsupport) emailed me a new BlitzPlus BUID and deleted the old one so I could set up an account for my nephew and niece.