Quote:
Originally Posted by DNSB
You can use Calibre's Modify Epub plugin with Insert or replace cover checked and then keep the original file (shows as ORIGINAL_EPUB format) until you are happy and then bulk delete the ORIGINAL_EPUB files. If the book is messed up, I copy the original_epub to a temp directory and rename it, delete the epub and original_epub in Calibre (not removing the book but removing files of a specific format) which leaves the metadata and cover image and then drop the renamed file on the details view (on top of the cover image works for me) to place it back in the library.
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I have a lot to learn about Calibre. I just went into the edit metadata screen for one of the books I did the epub to epub conversion on and deleted my new epub. Then I wasn't sure if I could somehow copy the original epub from there to a temp folder or if I had to do it with file explorer so I tried right clicking on it and there was an option to "restore epub from the original". It seemed to work fine.