BAR-CODE is spot on, the 'upgrade' product is exactly the same as the 'full' product. Only the price is different, nothing else. It's not actually an 'upgrade' at all, and I wish they wouldn't use that term, it just creates unnecessary confusion and questions.

The Poser 8 install does not check if you have an earlier version installed on your computer.

Once installed, the serial number you enter is the Poser 8 serial number SM sent you by email when you bought it. If you have lost it, get in touch with SM and they should send it again.

"If I were a shadow, I know I wouldn't like to be half of what I should be."
Mr Otsuka, the old black tomcat in Kafka on the Shore (Haruki Murakami)