Create Menu bar region

Step 1 Go to Structure> Menus link

Step 2 In Main menu area, click "list links" operator. Click "Add link" to add a new link

Step 3 Add following links structure:

Step 1Go to Structure > Blocks

Step 2 Find a "TB Mega Menu: Main menu " block. And set following properties:

Step 3 Click "Save block" button.