This past Sunday, we were able to get through the first part of our presentation, once we got into the songs, of which I run MP4 loops on, the software just froze on us. I CTR, ALT, DLT out, and when I tried to bring the software back up, it would not come up. I actually had to reboot the computer in order to get the software to go again, got it going on another song, the software froze again. At this point we just left it down.