I upgraded from 360 to NSwB on two computers. Both seem to have installed fine, but with one computer Norton still lists 360 along with NSwB - including Norton Management, Norton Studio, and my Norton account. [Note this is not the history of purchases row, but rather in the "devices" section. Norton even includes a "Security Warning" for that computer.
I have tried to uninstall the 360 listing via the garbage can icon on sites, but after a long loop, it says "uninstall failed." I did call support and they said "don't worry about it, leave both listed," but I just want to check with the expert help on this thread. Seeing a security warning makes me uncomfortable.