I have NTR 3.2 on my 3ds but it doesnt work with my 10.4 emunandShadowtrance's BootNTR, which I'm using: https://github.com/Shadowtrance/BootNTR/releases
cell9's BootNTR: https://github.com/44670/BootNTR/releases
Keep an eye on those pages for future updates. If you want to go bleeding edge, clone the repository locally and build the files. Open issues on them if you like, but it's likely people will just complain here.