Use ReverseNX-Tool.Thanks. It works for now as I don't know how to set ReverseNX per title, could you please help me on that?
What I did
SaltySD/plugins/01006C300E9F0000/ReverseNX/handheld.flag <--- this won't even work
SaltySD/plugins/ReverseNX/handheld.flag <--- this works