Thanks for your help, Steve.
Here's part of the response from esellerate:
Inquiries regarding the following topics will need to be directed to the software developer directly. The software developer’s contact information can be found by going to
http://store.esellerate.net/support. Enter the email address that was used to place your order and the order number found on your order confirmation email to access the After Purchase Services Page.
Not much help from their site I'm afraid.