Reply To: Updated for 2.2: Step-by-Step Guide

[Mutex]

Maybe the executable has no execution rights

If that’s the case this should fix it:
sudo chmod +x opt/retropie/emulators/pisnes/snes9x

You can remove the entries from the gamelist.xml in ~/.emulationstation/.
There’s also a folder with downloaded images and since emulationstation by default just looks for roms that have no image set it will skip those.
If you just moved the rom to a different folder after scraping the path to the rom set in the gamelist.xml is wrong and starting them shouldn’t work.