UniqueOpp,
You can import a listing from a closed eBay listing by going to Auctiva -> Listing(tab) -> Closed Listings. Then, check the box next to the listing and click "Import Listing". this will import the listing to your saved listings folder.
Then, go to Auctiva -> Listing(tab) -> Saved Listings and locate the item. You can revise and/or relist it from there.
-Mike