NoSmartz, thank you. I did exactly as you suggested (several times), but it did not work.
When I hover over Make Your Own DVD-Video, true it remains the only one lit, and also a box appears saying "Open With: NeroVision Express". So I next click on Configure, which says "Open With Nero Burning Rom", but it does not, it always opens with NeroVision Express.
A question: After I have opened Configure, and made changes, I do not see a button which says "Save Changes", or words to that effect. Perhaps that is the reason the changes do not 'stick'. Do you know what I have to do to make the changes I made in Configure to 'stick'?