How to change the ad account connected to Thrive?

Answer 1

This is done automatically via the Business Dashboard when you proceed to create a Facebook Ad from the same.  
Follow the steps given below:

1.  Select the Facebook Ads option from the Navigation Menu.
   
2.  Ensure you log out of the Facebook Account already connected to the Business Dashboard.
3. Now log in to the new Facebook Account you want to connect with, ensure this is done on the same browser you are accessing the dashboard from, and click on the Create Ad button. 
   
4.  In case you are not logged in, a prompt window will open that will request you to sign in to your Facebook Account. Here, log in via the new Facebook Account.
5. On successful connection, the next step to Create your Ad, which is Ad Account and Page selection will show up.