I am unable to burn DVDs because, not thinking, I renamed the external drive the project is on. How do I fix the problem in DVD Studio Pro 4? I changed the name back on the drive, the files show as linked, but it won't burn. I've tried to refresh the assets, didn't help. Relink is not available to try. I tried to go to file/advanced burn & build, but it was not available either. I'm new to all this so am very afraid to trash the preferences, not knowing if I'm going to do other harm.