If you purchased AudioLabel using a credit card, an order email was sent out which contains a link to a printable receipt. This is the first email sent after purchase, and has the subject:
"Order Complete - AudioLabel Version 6.0
"Order Complete - Upgrade to AudioLabel Version 6.0
If you purchased AudioLabel using PayPal, the order receipt was emailed by PayPal. You can also log into PayPal, find the order and print a receipt.
For most credit card and PayPal orders, the full version download page displays a link to your order receipt (under "Your Orders" as show below):
You can get to the full version download page from here:https://www.audiolabel.com/full-version.html
I was able to lookup your email address, and have emailed the link to your printable receipt.