You can access your Avanquest web-store account by clicking here log in using your email address and password then navigate through View orders and select the date when your order was placed from Complete orders list.
Here you can download the file for the program and securely send an email with installation code (also known as serial licence number) included to your private email address. Also to view the invoice form in printing friendly format.

Note: orders of Avanquest software placed on other web-stores or through retailers and shops will not create you an account in Avanquest web-store nor will appear in your list of orders.