As I told you in the other topic you opened, ask the vendor, we don't offer support for scammers that sell RetroPie pre-loaded. Please don't open anymore topics on this, you'll not receive any support here.
No, no, I get it. I wanted the optional emulator anyway but the problem is clearly with the roms/images and not with the emulator. I appreciate the kick in the right direction.
I was pretty sure I installed the supergrafx emulator but it wasn't showing up when I was selecting it in the list. After installing it manually from the source it came up as selectable and showed the problem was not emulator related.