Don't waste your time with this. Bannister is a bottom-feeder. He removes functionality from free software and then charges money to put it back in. His attitude would get him laughed out of town on any other platform, I don't know why people put up with him on the Mac.
Get NekoLauncher Mednafen. It's an OSX multisystem emulator that is 100% free and infinitely superior to anything Bannister has scummed up.