When I try to insert a title before a movie all I get shown is a black frame. This has only just happened. Before, if I saved the movie to, say, Photo Gallery, the opening title frame would be displayed. This was very convenient. Now instead I just get the opening frame of the movie and no title frame. I have tried repairing Windows Essentials, but it made no difference. If I play back the movie through, say, Photo Gallery, the movie opens okay with the title frame as normal. How can I get things back to the way they were?