If you want to make major changes in the template area, or even the template itself, you can cut and paste the HTML from your revised Auctiva template in your "saved" folder to your old template which is now in ebay. Here is a post that should make this clear and show you exactly how. It is quite an easy process.
https://community.auctiva.com/eve/forums/a/tpc/f/6881044121/m/4061052622
I hope this gets you where you want to go. Good luck.
