A brand new version of the SNES MYTH MENU has been released which includes 2 major updates : Original cart rom & sram dumping directly to the SD card by just plugging your cart into the back of the SNES Myth!
Full release changelog
Cart dumping support. You can dump the contents of the bootcart (the one that you plug into the back of the SNES Myth) to the SD card. I've verified that it works for ROM, and should hopefully work for SRAM as well. (See the readme for more info, because you need to put some files on the SD card for this to work.)
Added key-repeat. If you hold up/down for about half a second it will start repeating keypresses until you release the button.