How to disable default widgets?

Dear @Joan
These widgets can be disabled from the widgets menu under the theme settings.
However it looks like a template issue. Kindly follow the instructions below to resolve the issue.
http://cmspioneer.com/designwall/guide/dw-question-answer-plugin/#Style_integration

Hi Joan !
Is there any update on your issue yet? Let me know if there is anything else we can help.

Hi Joan !
If you want to disable the widget in the sidebar of all the page, you can add the following code in the style.css file (Dashboard > Appearance > Editor )

 #sidebar {
    display: none;
}
.maincontent {
    max-width: 100%;
}

– If you want to disable the sidebar widget for the DW Q&A, you can add the following code to the style.css file:

 /* In question list page*/
.list-dwqa-question #sidebar {
    display: none;
}

/* Single question page */
.single-dwqa-question #sidebar {
    display: none;
}

/* Submit question page */
.submit-dwqa-question #sidebar {
    display: none;
}

Hope this helps !