EmuNAND is (to the best of my knowledge, though I could be wrong) completely broken for now. Mainly because any CFW that uses it will not be able to load it up properly with 11.3's update. Unless you actively mess with your firmware or the 3DS code you really don't need EmuNAND anymore anyways. If you want A9LH which gives you pretty much full use of your system, along with a great custom firmware that supports everything that you could want. I'd suggest you install Luma and A9LH BEFORE you do anything else, part of the guides to do this will tell you when it's safe in the walkthrough to update. If you're moving from EmuNAND to SysNAND (What Luma uses) you can find guides using hourglass9/decrpyt9 to move them. I THINK it's basically just dumping your EmuNAND and injecting it into SysNAND but I'd double check with the guides. I moved from ReiNAND to Luma+A9LH a little while back, and it's the best choice I made. It really is that simple, and if you have questions, people here are really nice and can help you with problems, or point you to the right guide to follow. Best of luck!