Thanks guys for your suggestions. I appreciate your taking the time. I think this might be an unsolvable problem. Ynotfish, I did try opening from the C drive without any luck.
I think some of the problems might stem from my computer crashing and my having to disk image the drives back to a couple of weeks prior, although I don't see why that should effect anything because these videos were completed well before that.
Another problem I have is that I don't clearly understand how PD calls for the all the files that it needs. For example, PD calls for arrow1 which is simply a red arrow, the one I uploaded previously. So I browse for arrow1, it is accepted and appears in the library of the video, the panel on the left. But it does not appear in the timeline where it used to appear multiple times. Because this red arrow appeared several times in the video and was placed in different orientations and positions, PD must record each one of these changes in location and orientation. My guess is that each instance of the arrow used in the video is stored in the file "users/public/Cyberlink. I have all the files, I just don't know how to connect the dots in order to make the effect appear in the video the way they used to.
I don't mind paying $30 for Cyberlink support especially considering I have about 50 videos to deal with and to get the effects back would save me at least a months work. The only thing is I don't know how good that support is and whether or not they would be able to fix the problem. Has anyone here ever used it?
TraderJohn