Hi Community,
When you change the header/gallery images of your listings, the Auctiva store/store window images associated with those listings will not be updated automatically. However, our support department will be able to re-generate your Auctiva store/store window images manually, which will result in this content being updated.
For further assistance with this matter, please file a support request using the appropriate link on our help page:
http://www.auctiva.com/free_auction_software_help/help.aspx
-Mike