I tried to install CFW on my old 3ds using http://3ds.guide some months ago (4-5 months ago) and when I was going to restore sysNAND backup (keep a9lh) but it couldn't find a backup and when i tried to start the system it was just a black screen. So recently I used CTRTransfer to go back to 9.2.0 and then updated the system through system settings (updated to 11.4). I can't launch the system without the sd card with my files that I had when I tried to install CFW. So is there any way to install CFW on my system again or am I stumped because I have 11.4? Sorry if I explained badly.