I have been successfully using the plugins to handle KFX *input* for a while now, but recently my wife sent me a set of epubs to load into Calibre since I have the master version. They loaded into Calibre just fine, but when I tried to convert one to KFX, I got the following:
calibre, version 8.3.0
ERROR: KFX conversion failed: <p><b>Cannot convert A Stone Cold Murder</b><br/><br/><b>Conversion error:</b> Exception('Kindle Previewer 3 not installed as expected. (C:\\Users\\Administrator\\AppData\\Local\\Amazon\ \Kindle Previewer 3 missing)')</p>
I'm guessing I am missing something. FWIW, I don't reallu need these particular books in KFX since I will never read them, but it seems like I should have the capability.