Covert into Calibre

The articals about .kfx file and the .sdr folder associated with the books make sense now.

I have just spent 3 hours trying to Convert that are in a new format (.kfx file and the .sdr folder)r 2 books Remove (DeDRM) I bought from Amazon for my Kindle using Calibre lastist Version & Apprentice Alf’s plugin using Windows 10 wsith no luck, is this of the new format

Anybody have a work around

Stephen