Then this is beyond my knowledge. If you want to keep your old setting, you may need to wait for other answers.
But, since 11.3 right now is deadly, totally unhackable with NFIRM patch. if you accidently update sysNAND, you're doom.
Any hardmod can't help you hack again (except you have NAND backup below 11.3) unless the new arm9 exploit is out.
So, I advise you to take this oppotunity to move to A9LH.
There is 2 things you need to know about 3DS hacking before doing A9LH.
- 3DS exploit: This is a way allow to run somethings that normally can't run such as homebrew, etc. Example of 3DS exploit are menuhax, arm9loaderhax, fasthax, etc.
- 3DS CFW: This is what you want to allow your 3DS to add more function to FW, such as out of region cart load, pirating, ETC. This one need 3DS exploit to be able to run. Example of CFW is Luma3DS. ReiNAND, Corbenik.
The choices you have now is Installing
Arm9loaderhax (A9LH) Exploit with
Luma3DS CFW. Can be done by booting to sysNAND, changing a theme (just color is OK), then following this guide:
http://3ds.guide/. This setting is mostly safe from removed by Nintendo. The problem is, this setting require user to hack into 3DS System files. So it has a small risk of brick. But,
if you're understand and following every step of the guide I gave you correctly. Even though you bricked, it can still be fix by hardmod. The guide will pointing you to merge emuNAND back to sysNAND. But you can keep using emNAND if you want.