[Riter]

I have a long list of classic ePubs I imported from Project Gutenberg and other sources. I've spruced them up for easier identification on my iBooks bookshelf by adding a custom cover. After I make that change, the book's folder in my Calibre library folder includes both Book-Title.ePub and Book-Title.original_epub.

I just went through and deleted all the .original_epub files, which no longer serve any purpose. Can anyone tell me how to get those old files to quit displaying in the book properties pane on the right?