if you can't work that out i doubt you have the capacity to help.
obviously, contact the authors.
besides that, HOW do you want to help? Do you want to program or beta test?
If you want to program, you're gonna need to be fairly experienced. And have some kind of experience in coding emulators.
If you want to beta test (which i suspect), there's plenty of those available and i doubt they need more. If this is a plot to get the latest version of the emulator, just forget it.