Bulk-restore ORIGINAL_EPUB to EPUB (& remove not-original EPUB made by plugin)
Some time ago. I used a plugin (it might be "Polish Epub" plugin) that renamed the original epub to file.ORIGINAL_EPUB and the newly modified epub to file.EPUB.
There are about 200 books in my library that have both ORIGINAL_EPUB and EPUB.
I now want to undo this. In other words, I want to delete these modified EPUBs and turn the ORIGINAL_EPUB back to what they used to be: file.epub.
How can I do this change/restoration in bulk?
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