I suppose that he's referring to the included SNES emulator into TWLMenu by defaultYou may have to get an alternative emulator. Did that come with the TWL Menu or did you install that one on your own?
I'm using a *.3dsx version of SNES9x that you can run from The Homebrew Launcher. It works really well for me on my o3DS console.
I suppose that he's referring to the included SNES emulator into TWLMenu by default
And I reccomend (exactly than you made) use better a 3DS-mode SNES emulator, like Snes9x by bubble2k16 (if you have an OLD model console) or any Retroarch SNES core (if you have a NEW model one)