Yeah, seems firewater is dead with newest M8 software so if you just got your m8 or did an OTA by accident you're out of luck for now.
I wish we could get a statement from the authors of firewater just to see what they think and if this issue might be resolved.
Yeah, they won't be fixing this because the paid version is out. Sunshine works, but cost $25, which sucks, but it did the trick for my m8.