For those that can't get it to work on emuNAND even after installing the hb_menu to both sysNAND and emuNAND and having the right TWL_Firm patch installed try installing the patched TWL_Firm to sysNAND also, although it is not recommended and yes, it does break TWL mode outside of CFW on sysNAND that is what got it working for me for some reason, I just instantly got the "A problem has occurred" screen after launching it on emuNAND till I did this, I have unlinked NANDs on n3DS XL with the emuNAND on 10.6 with 10.4 firm if that matters in any way.