I hope this isn't too far off-topic: does anyone know if there's a trick to convince the Calibre Editor to open a KEPUB file as an ePub? When I buy books from Kobo, I like to keep them in KEPUB format, so that I know it's an "official" KEPUB, and so that the output plugin simply copies the existing KEPUB directly to the device.
However, in order to do any editing of the file, I have to change the file's extension before I can edit it, then change it back. This is a bit of a pain. Any ideas?
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