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JimmXinu Sorry I can't give more than that, but even when I opened in debug after the installation it didn't show anything about FFF. So I don't know where the break happens.
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BetterRed You're right, but at least I can once more enjoy all the options of Calibre that I love so much
And even though it seems like a foolish reason to cause the failure apparently it wasn't my only problem as a result of that, I also had an unrelated program I couldn't install and now have no problems with.
Very strange considering Windows comes in so many languages. Or maybe there was some problem with the account in general? But it was brand new on a new PC.