What about offering it free, but asking for donations? I bet you'd have more downloads, and even generate more revenue than selling it. Donors could then "pay" on the donations Web page, and --importantly -- make a note that it is for the ap. Better yet, have the fund added to the drop down menu.
Dave can arrange with OVP to make sure that all such donations would get deposited into the Web Site Restricted Fund (where the income from ads and hosted accounts go so that it is available year to year to cover Web site-related expenses)