Back in March I created a 6 minute long video. ALL of my work on the time line is gone. It's like it saved the progress from the first 5 minutes of me creating the project. All of my folders and extra video/audio files I added on a later date (after completing the video) to update the file is still saved with my project, and still organized how I had it. Why did this happen and does anyone know if I can fix it?