If you have bought Mover 4 as a standalone program, you may be able to use it with Vue 4. Your scenes created in Vu ePro will not work in Vue 4. Vue 4, updated to 4.2 can import Poser 5. The differences between Vue 4 Pro and Vue d'Esprit are enormous. No plant editor, no wind, no Python, no automatic recognition of figure changes in Poser, no possibility to aim a light to a special object, no undo, and, and, and, many other features that doesn't exist in Vue d'Esprit 4. So, first try to find out why your Vue Pro crashes. There is for sure a solution. It could be a graphic card issue and OpenGL. If this is the reason, disable OpenGL. Not anough memory? Are you using MAC or PC? Tell us more. What kind of error messages are you getting? Have you correctly installed your Mover (from the Pro CD?). What are you doing to make Pro crash? Guitta