You also made a really really bad mistake trying the NJHax on 9.4 emunand, trust me, I did!!! You will find out now downloading anything of e-shop, updates, youtube etc.. you name it in emunand, it will now create an unknown error code on you all the time at 99% of the download and the only way to get around this issue is to format your sd-card and start all over again, yes you lose everything, you will need a fresh emunand and also a total fresh sd-card, there is nothing you can do to correct the mistake!. I made the same mistake as you and then found out this happens and that is your only solution, wave goodbye to all your settings and saves on your 3DS emunand and say hello to your new emunand and settings.