There are currently no plugins at all installed in my version of Calibre (see image link below).
Unless I'm missing the obvious (and there's a good chance I am), I can't find or see any reference to any drm plugin *that is currently installed* in the list of files I provided.
Please, Kovid---enlighten me.
https://photos.google.com/photo/AF1Q...XaT9v5YkFRIyvb