Here is the readme for all the files on that github. It doesn't give any info about Afro30As specifically, but I'd put good money on just trying afro.hex. I'm guessing a 30A ESC won't be classed as high-voltage, so give that one a try. I bet they all use the same chipset anyway. If all else fails, you should be able to find the original firmware and re-flash it right? I'd say try it.