Wonder Lister
User guide

Can I Delete my pictures from my computer after creating a listing?

In Wonder Lister, when you create a listing, you specify the picture's path from your local computer. That path is permanently associated with the listing in question. If you later on delete that picture from your computer, Wonder Lister won't be able to show that picture since it is no longer present. Thus, you can't delete a picture once you have used it in any listing.
Please note that the content of the picture itself is NOT saved in Wonder Lister's database, what is saved is just the path where the picture is located on your computer's hard drive.