Use Left/Right to change between ROM selection and emulator options.(Hold down X while pressing Up/Down to Page Up/Page Down) Use Up/Down to choose option, and A to confirm.Exit your CIA installer and go to your CFW's home screen to launch the app.Copy snes9x_3ds_top.png to ROOT of your SD card.You can also use FBI to download from TitleDB.
It also runs on your New 3DS, and performs much faster! Use your New 3DS if you want to play SuperFX and SA-1 games! It generally supports higher compatibility than existing SNES emulators on the old 3DS, because it uses Snes9x 1.43 as a base, and is a good alternative if your existing emulators cannot play all games. It can also play games that use the SuperFX chip (Yoshi's Island, etc), and the SA-1 chip (Super Mario RPG, Kirby's Dreamland, Kirby Super Star) but it runs slowly. It supports games that use CX4 chip (Megaman X2/X3), and the SDD-1 chip (Star Ocean, Super Street Fighter 2 Alpha). It runs many games at full speed (60 fps). Snes9x for 3DS is a high-compatibility SNES emulator for your Old 3DS / 2DS.