I did make a mention of this in my Facebook group, and warned people to NOT update X Plane to the beta if they want to run the Saab, because of the autopilot issue. The latest update is a Release Candidate, so it is still not a stable release.
I was working on an update to address the autopilot issue, and a few other things, but I can't do much until X Plane 11.10 goes final.
I will continue to work on the update and try to get the autopilot fixed. The autopilot DOES work, but it's very sluggish, and often, if it turns too far, it will go beyond limits.
Worst case scenario, for me, is making a completely new flight model...which I am prepared to do. But first, I need to exhaust all other options before considering that.