"Frieda+" is wonderful for EPUBs
[1] Wherever you got your "DRM plugin" is where you need to go for support for it.
[2] Windows 10 app "Frieda+" is wonderful for EPUBs. Highly customizable. I use it on my tiny Win10 tablets running Calibre64. I never use Calibre's Viewer on any PC, including my desktops.
DaltonST
|