That's the guide I followed when I attempted the installation using Luma Plugin Loader and I'm not running BootNTR at all. I checked if I had any other .plg files anywhere on my SD card just in case something was messing it up and that is the only one there.
I've used the files from GitHub when...
I'm having trouble getting the plugin to work when attempting to use the "ActionReplay" method to make it work for all games without individual TID folders.
I can get it to work if I create the individual TID folders in the plugins folder however when trying with "ActionReplay" folder and name...
@Xdqwerty, Osu! Tatakae! Ouendan! is the Japanese version of the game, different settings/characters/songs but otherwise identical mechanics. I played that before I knew about Elite Beat Agents lol. Both fantastic games https://en.wikipedia.org/wiki/Osu!_Tatakae!_Ouendan