Forum Thread: Sony Vegas Pro 13 Deleted Effects in Movie

Hey, so I'm editing a video for my friend (it's a First Person Shooter with guns (toy guns) explosions and all that) and I'm days into editing it and then I notice that all of the muzzle flashes have disappeared. I know they were there before because I've been editing them for days. I've saved multiple times and closed the program multiple times. Is there any way possible to recover a previous save or make them re-appear? I've ctrl Z as far as I could and it only took me to the beginning of where it was last saved. The weirdest part of it is that it's just the muzzle flashes from the gun the user has. Please help me with this because I've been working on this day and night. Thanks! -Nate Campbell