I am not sure how to change the current profiles of registered aircraft, only when I link planes.
N508MV as a Citation 560XL is no longer registered - it has changed registrations twice as N412CC and now wears N808W according to
http://www.laasdata.com/corpjet/corpjet-by-type.php?t=19
N808W is still showing registered to Lear 31A on here. I couldn't find if the Lear 31A is wearing a new registration now.