I had a similar experience tonight when using the PAA on an unfamiliar mount, a Celestron AVX. New profile had default telescope focal length specifications. I would enter the focal length and hit Save tree Telescope Info, then go to the PAA and set the fov greater than 10 arc minutes warning and some greyed out PAA options. It solve the first frame then crash KStars by the next frame.
It turns out that in my haste, I did not give the telescope information configure a name. Once I did, the configuration saved properly and PAA stopped crashing. Worked flawlessly, no more 10 arc sec warning, and no greyed out options.