Question: how to convert kfx files?
Answer: Step 1download Calibre to your computer and launch it., Step 2download DeDRM_tools and KFX Conversion Input Plugin to your computer., Step 3load DeDRM Calibre Plugin and KFX Conversion Input Plugin to Calibre., Step 4add Kindle KFX books to Calibre by clicking Add books in the tool bar., Step 5Convert KFX to Epub/Mobi/PDF.