I got a KLC for a test drive with a possibility of returning it. I'd like to run KOReader on it so that I get Bookshelf, Bookends and other beatiful/useful plugins, so that I can properly test as if it was my daily driver. If it stays, it stays. :) If I don't like it for some reason, I'm going to return it, so I'd like to restore it to factory defaults. AFAIK restoring the device itself is not enough.

In order to uninstall KOReader, I just delete .adds/koreader and in order to uninstall NickelMenu I put an empty uninstall file in .adds/nm and reboot. Then I can additionally restore the device to factory defaults.

Is that correct?

To uninstall NickelMenu, just create a new file named uninstall in .adds/nm/, or trigger the failsafe mechanism by immediately powering off the Kobo after it starts booting[^1].

I have done this maybe last year or something and confirm that the official documentation of NickelMenu works. Haven't in- or uninstalled koreader in a very long time.

^1: Patrick Gaskin, 'NickelMenu', https://github.com/pgaskin/NickelMenu.