For 3DS :P
(Only if you have installed the DSI System settings and used the Data Management by accident lol)
(Warning: I will recommend to Backup your nand before doing this).
If your TWL apps (DSIWare) or NDS games don't longer boot and the Firm method didn't work, then this might help you a...
Only thing drive me crazy is all these new horror games nowadays is its so dark, all time. I can't even play them. I understand they trying to create spooky but be creative a little, not just darkness with pop out scare scenes.