I just heard about this today. From the information at
https://www.epubor.com they've been around for a while but I've never read any mention of them in here, which surprises me. Is this old news and I'm just finding out?
Anyway, it's a $25 converter for all sorts of ebook files, including KFX, it says.
Does anyone know about this?
I read about it in another forum and the person mentioning it says it works well but that it creates files about 50% larger than those created by Calibre.
I didn't get it. Calibre is still doing just fine for me. But it's nice to know it's there if I need it.
Barry