I doubt that's the case with Roxio. I have great faith in Roxio's burner softw. which was previously owned by Adaptec & is one of if not 'the' oldest burner softw around. It's been around much longer than Nero. It was used for burning CD's & dvd's way back into the 1990's. But for dvd's I think started off on the mac OS before windows.
Now about your problem. Go to your LW Library Window & select Saved Files. Then select any file to the right of it. Then press the Explore button. This will open the folder up for you. Now yo can drag & drop your files of choice into Roxio's burner app. Simple as that.
Saved Files is a pseudonym for your LW Downld folder. It's the same thing!
I hope this solves your problem.

So what's my play of the century prize? lol