Please see the most recent updates in the "Where did the .com name go?" thread. Posts number 16 and 17.
Please see this thread for updates. Update Thread
SOH ADMINISTRATION
It turns out I had to comment out the default flight from fsx.cfg and FSX defaulted to Friday Harbour, microlight etc. Loading the Bronco and changing airfield etc gave me a running, starting (if necessary) Bronco after that. Things had been so bad the default King Air 350 and PC-7 weren't behaving either when I tried them. 
Glad you got it running Tom. Only problem I have with either of those two is trying to get the OV-1 to stop creeping while in idle and then to slow down on landing, lol.Thanks all for the suggestions, but none worked.It turns out I had to comment out the default flight from fsx.cfg and FSX defaulted to Friday Harbour, microlight etc. Loading the Bronco and changing airfield etc gave me a running, starting (if necessary) Bronco after that. Things had been so bad the default King Air 350 and PC-7 weren't behaving either when I tried them.
Funny enough, the OV-1 never gave any problem and it has twin turboprops too...