Upgrading from Build 4.38 to 4.65

I have been using your HTML Help Builder on an XP computer (last build there is 4.38). I have recently
"moved" to a new computer running Windows 7 (peer pressure :)). And I could not find a copy of the original download of HTML Help Builder when I purchased a copy (I believe in 2004 or 2005). Now when I run this copy of HTML Help Builder I see a message of "shareware." Obviously I would like to make my copy legal. So my question is, what is the price to make the copy of Build 4.65 on my new computer legal (remove the 'unregistered version' message)?

If you prefer you can email me to the address posted in this message.

Thank you.