While using the editor in PSE 10, it suddenly stopped working, giving me a "run time error" message. I have created a new user account, created restore points on my PC, attempted to change the preference files, all to no avail. The software came installed on my PC, so I'm unable to do an uninstall and reinstall as I don't have the installation CD. The PC manufacturer and Adobe support have been unable to help (neither providing me with a product key). Can someone help me fix the "run time error"? Until it's fixed, the product is unusable.