I make a video about 1x per year for a family vaca. I downloaded videos and pics. I grabbed video and added to timeline. I wanted to trim the video so I tried to use the scissors and it didn't work. I then deleted the video from timeline to start again. I received error message saying the video now can not be played and I needed to pay $5 to update software. I did so. Now I can hear the audio but I cannot see the video. I downloaded another copy and same. All of my other MOV videos play fine. please help.