Hello Dave,
1. The last software I installed for P3D was the Orbx NA Landclass but PF3 was working great after that was installed and this did not start until after I had been using for a couple of weeks. I am using P3D 3.35 but again working great with that software up until last week.
2. What I do not have control over is the Windows 10 Updates. Is it possible that a Win10 update could affect this procedure.
3. Everything seems to work with the program until I try processing a flight plan and that is where PF3 becomes unresponsive although Windows does not say this. I left the processing screen on for a good 15-20 minutes yesterday to no avail, it just keeps saying that it is processing the flight plan. If I place the mouse over this window, the windows working icon is displayed, looks like a circle or an arrow moving in a circle. I double click per the the message at the bottom of this window to open the program interface but I cannot click on any of the tabs or close the program without using the task manager to close the program.
I hope this information helps.
Thanks,
Mike Cameron