I posted on Declic that I was never notified by Corel that there was a patch available. I was notified by Declic (thank you) I do have an issue...Many people were complaining about a black preview screen, which I had never experienced. Unfortunately now I am. When I scrub through scenes manually, everything is fine. When I use the controls (arrow/play  keys) , I will get bursts of 'black screen' and it does not seem to have any rhyme or reason. Very strange. Hopefully a fix will come for this as well.