If it's something random, then I would suspect it's something on your end. I just tried loading it up and flying it, and everything works fine.
In cases like this, it looks like a plug in conflict. I would suggest removing all your plug ins, except Gizmo, then try it again. Several times if possible. If it works, then replce the plug ins, 1 at a time, loading up the DC3 each time, until the problem returns.