spinnyjoy

Sorry if this is bumping the thread or whatever but I'm having the exact same thing happen as the OP- I import a load of SNES roms, add Retroarch, make sure the SNES core in the associated platforms is the same as I got in the cores folder (snes9x_libretro.dll), the games work. I move onto adding some Mega Drive roms and even though I've selected Retroarch from the dropdown list and even though I've made sure the core in the associated platforms tab is the same as I've got in the folder (genesis_plus_gx_libretro.dll), tryin to load any of them just brings up a black screen like either LB or Retroarch thinks I'm still trying to load SNES roms. How do I actually make it so it knows which core to load for which system? EDIT: nvm I figured it out