i have a copy of quark 4 that i picked up from a friend when he was getting out of the design business. as far as i know everything is nice and legal, but i have never registered the product, and i have no idea if he did when he first purchased it. i was thinking of upgrading now to version 6, with one of their upgrade options. will i run into problems if i haven't registered version 4, or if it is registered under someone else's name?