Hi freelance,
Welcome to Auctiva! While it is possible to edit your existing eBay listings to use Auctiva's templates and other design features, it is a fairly cumbersome process that requires redesigning each listing in Auctiva. In order to update your listings in this manner, you would need to revise each via the following process:
1) Recreate the listing in Auctiva and click "Save". Since you will only be revising the item description, it is only necessary to fill out the “Item Details” section of the lister page.
2) Once you have finished, click the "Save" button.
3) Return to your Saved Listings page, check the box next to the item, and click the "Get HTML" button.
4) Highlight and copy the HTML that appears in the pop-up window.
5) Scroll down about 1/3 the page to the “Description” section and click the "HTML" tab on the editor.
6) Delete the html that is already there, paste the copied html in its place, and save your changes.
I hope you find this information to be helpful. If you have any additional questions or concerns, please file a support request using the appropriate link on our help page: http://www.auctiva.com/free-auction-software-help/help.aspx
-Mike