Using Tyche Software Print Invoice and Delivery Notes Plugin

Hello,
I am using Tyche Software Print Invoice and Delivery Notes Plugin and there is a setting in it to allow for a print link in the emails sent out by Woo.

In the plugin settings I have checked to Show the order print link in Admin emails (This includes the emails for a new, processing and completed order. On top of that the customer and admin invoice emails will also include the link.) — BUT it is not showing.

I am assuming that it’s because I am not using the default Woo emails.

How can I show this link using your Email Template Customizer?

Please advise!

Thank you.
Chris