ElleKayEm commented. ... After you unzip DeDRM_tools_6. 7.0. zip, rename the unzipped folder something like "unzipped DeDRM tools"

Could not install plugin on windows calibre, Im a new user #2111

: Often requires "Customization" within calibre to work, such as entering a physical Kindle serial number or using specific decryption keys. Installation Guide

: DRM removal only happens at the moment a book is imported into calibre. It will not work on books already in your library unless you remove and re-import them.