Create an account with ADE then activate using
adept_activate -u "your.adobe.id@email.com" --output-dir ~/.adept
IIUC this eats up an activation (I think they allow at most five) so back up the contents of that directory. You should be able to bring it with you to other computers.
I've used libgourou successfully many times in the past year to remove DRM using my ADE key.
I angrily started doing this for every book I buy after changing reading device to a newer Kobo, and discovering that all the download links for .acsm files that my book store provides will expire after two years. I.e. after those two years it's impossible to move them to a new device unless I remove DRM.
If that's the smallest computer chip in the world, the hand must be tiny
Satya lives in the biggest glass house in the world and yet he's up there throwing the biggest fucking boulders. How about he just shuts his mouth and realizes he has overstayed his welcome by about ten years. The ignorance is mind boggling.
Turns out, I am no longer human
It never does.
libgourou has no need for anything that has to do with Kobo. It's really only three cli commands: activate (once), download acsm, de-drm. It produces an unencrypted .epub that you can open as is or copy to your Kobo device with any ordinary file operation.