The Paperwhite I use is registered to the account of my late wife. How do I register it to my account ?
Deregister it. And register it to your account.
regretfully, Amazon have switched on their idiot internet language nanny (which was programmed by committee) which inserts asterisks all over the place and makes communication very difficult.
the best way is for you to google how to do this which should point you at the required help page.
e.g. Password, assumed, bass, parse, suckling, the seaside town S****horpe. Mmm! suckling is ok but ***** isn’t (S U C K S)
wheres the good old British bloody get away with it...!