What happens to the video file when I open a PowerPoint that was published in Presenter 09 and I allow the file to be upgraded to 13? The video appears to be dropped. Can the video file somehow be recovered and reinserted without having to locate the source video file? We're converting some courses to Presenter 13 so they can be viewed on iPad and I would rather not have to go back to the video producer to get the video files. Help?