Yes, as a superuser you can customize and edit your hubmenus this way:
1. Go to Menu, Super, Hubmenu
2. Click on one of your hubmenus
3. Click on the Edit button on the top right corner
4. Use these buttons to add new rows or columns(buttons)
5. Type in the name of the row if you want a row name (not required)
6. Click on the click text to name the button of your choice
7. Click the Folder button to add an action of your choice to the button
8. Choose what action you want from the list that appear at the bottom
9. Remember to also drag one of the button items to the button from top right corner
10. When you are done editing hubmenu click save button at bottom left corner
