Yes. You can get it here.
Just put the files on the root of your SD and install NTR with your favorite CIA installer.
https://github.com/astronautlevel2/BootNTR/releases/tag/3.4
Yes I see thisTry to see where you've downloaded the plugin if there's not a thing to do before activating the cheat.
Also you should be in game before activating a cheat, not in the start menu.