Without any details about your project, your workflow, or the versions of the software you're using the only suggestion I have is to make sure that everything is up-to-date. If that does not fix the problem and the software used to work then ask yourself the question "what changed?"
If you need further assistance I would suggest that you contact video copilot because it's their software that's crashing.
Without proper system information we can't tell you anything. The standard answer simply is that your graphics hardware is insufficient or misconfigured to handle Element 3D.