Contour - How can I delete shows in the "series priority" area that will never be shown again?

My husband recorded series of sporting events in specific years that will never be shown again and there are one time series that were recorded that may never be shown again and shows that were cancelled unexpectedly!.  How can I delete these??  Seems that the shows can only be deleted if you can find the show and delete it from the show listing.  There should be an option from the "series priority" section (in the schedules programs area) where you can delete the unwanted programs. I'd really like to see this option if there isn't another way to do this that I just can't find!