Originally Posted by YAP-IC
However, deleting the encryption.xml was not bringing a new result, except that now all other reader apps do not show the fonts anymore (what happens deleting this file, but was a nice try).
You could try the new beta
of Sigil, which can do font de-mangling with a right-click on the font file. I would only do this if the font has a free licence. The whole mangled-fonts thing is a joke IMO, as it's so trivially worked around, but I wouldn't do it for commercial fonts in any case.
Edit: Woa, sorry for bringing back a zombie thread, didn't notice the date