Question: What is an "Extended Upgrade Key"?
A Extended Upgrade Key is a code that may be used to activate Foxhound Version 3 as an Extended Edition copy after upgrading an existing copy of Foxhound 1 or 2.
You can purchase an Extended Upgrade Key here:
What are the differences among the different editions of Foxhound: Rental, Basic and Extended?
What are the differences among all the activation keys?