How to make questions go full-width? How to remove sidebar from single question page?

I purchased D&W Pro.

1. I want to go full-width when viewing all questions.
2. I do not want to see sidebar when I view a single question.

After reading pasts posts, I tried the following without success:

.single-dwqa-question aside#sidebar {
 display: none;
}

.single-dwqa-question .content {
width: 100%;
}

.dl_article {
 width: 100%;
}

Please advise!