[quote="briant"]No, I haven't tried that.
First, Opus was installed subsequent to Nero. And I am not using Nero 7 referred to below, but to Nero 6.
[/quote]
In the other thread where you mentioned this problem (posts concerning this have since been deleted for clarity on the other issue) - I gave you TWO links - one of which clearly points out that the same problem can be caused by a number of things.
[url]Drag & Drop does not work for files or when customizing toolbars]
[url]Can't drag and drop]