To restart the BZTurk MTurk extension, follow these steps: 1. Open your browser and go to chrome extensions. 2. In the search box, type 'BZTurk' to locate the extension. 3. Find the information card for the BZTurk extension and click on it. 4. In the bottom right corner of the information card, you will find a toggle button. 5. Disable the extension by clicking on the toggle button. 6. Once disabled, enable the extension again by clicking on the same toggle button. 7. This action should restart the BZTurk extension and restore its functionality.