[Leseratte_10]

Is that with an authorization that was "created" by my plugin, or by importing it from an existing ADE install? I don't expect there to be any differences for authorizations by the plugin, but maybe ADE is doing something funky on Windows 11, or Windows 11 changed how they're obfuscating these keys, as in theory they're only supposed to be read by the application that stored them (= ADE), not external tools like Calibre.

EDIT: Okay, I've set up a Windows 11 VM, installed ADE, authorized it, installed Calibre, imported the authorization, and was able to download a book through Calibre ...