Well I have been playing with a different editor for about 3-days now and have not been having any problems when I create new compilations. I have experienced a problem rendering a video when I built the compilation out of MP4 files that I made using PD10. So that leads me to think, perhaps there is something about PD 10 files that this editor does not like.
Oh well, after many many hours of struggling, I think I can finally start making movies. Unfortunately it will not be with PD 10.
The most important lesson learned here is: START WITH A TRIAL VERSION BEFORE COMMITING TO A VENDOR.
As Douglass Adams has said, “So long and thanks for all the fish.”