Quote:
Originally Posted by DiapDealer
Luckily, I've found that with those simple epub3s, changing the package version number from "3.0" to "2.0" with an external editor is enough for Sigil to open them as epub2's. Then I can continue downgrading the rest of the stuff as usual. Using 7Zip, I don't even have to manually unzip the archive. I just open the epub in the 7Zip program, edit the opf file, save, close, and re-open in Sigil.
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I can do that with EPUB Unpack (the free utility from the folk at AWP) ot Calibre, since that is my usual Launch point (open with PI) for Sigil