FWIW, my set of files in the Community folder hasn’t changed at all since I thought I had everything running fine prior to v1.1., other than the PMS GTN 750 update.
I’ve done some more testing today, and now I wonder if there might merely be something I don’t understand about the Century IV autopilot. Specifically, it seems that anytime I manually disengage ATT mode by clicking ATT, the autopilot lights up the GA button (which I don’t understand the purpose of) and thereafter I cannot reactivate ATT mode again while GA is lit (the latter just stays lit). But if I instead enable ALT mode while GA is “stuck”, then the GA light goes out, and after that I can reselect ATT mode and have it actually kick in again. Is this the intended behavior, and if so, is there an explanation for it?