@ChuckAndy, ya, the original Predator release wasn't for the Trigorilla Pro board in the Predator, but no one seemed to catch that. Keeping up with Marlin can be a full time job. I can't imagine what the development team goes through!
I've had very little luck with the latest bug fix, but the most recent full release (126.96.36.199) works very well after a bit of tweaking. Oddly, their example configurations for the Predator are completely different between the two versions.