After much searching I have found the answer. You can convert an Avast 4.8 Professional Edition Key to an Avast Profession Edition 5.0 key here: http://www.avast.com/resend-license.php
After much searching I have found the answer. You can convert an Avast 4.8 Professional Edition Key to an Avast Profession Edition 5.0 key here: http://www.avast.com/resend-license.php