auswombat wrote:If you want to keep using Calibre to remove DRM from Kindle ebooks on a Windows PC, you need to install Kindle-for-PC-1-17-0-Build-44170 or older. You also need to turn off automatic updates of the Kindle App, so it will not install a newer version of the app. Kindle versions more recent than Kindle-for-PC-1-17-0-Build-44170 use the KFX format, designed to nobble DRM removal in Calibre using Apprentice Alf add-on. Works perfectly for me.
If you don't have any kindle device you cant do this way, because you need serial of the kindle device, and the PC desktop version doesn't have serial number in amazon devices page.
Only solution for people without kindle device is to use apps which doesn't use serial number like Any.eBook.Converter.
Of course Kindle-for-PC-1-17-0-Build-44170 version is the must!
Be cautious there are many fake and injected versions use only safe versions.