Mark, I think it is clear for some time now that Dave has stopped developing Pfe. However, support is still given but when it comes to correcting bugs ... hm, I'm afraid there's very little hope.
PFE is still the best and most flexible ATC program out there, and I do believe nothing will come close to it in the near future. My only hope is that PFE would be given in the hands of a talented programmer who would be prepared to take over from Dave, just as he did once with Propilot. But that decision lies in the hands of Dave and nobody else.
Jos