The Status bar shows various useful information:
•a description of any menu item or tool bar button currently being hovered over or selected
•the icon for the currently selected pane (where File>Edit>Delete and other operations will be carried out)
•numbers related to the current plan, click on the numbers to configure this in the Status bar tab of the Preferences window
•whether the software is licensed (and a Buy now or Upgrade now button, if it isn't)