In the main section [2], you can once more see the Add data button. Remember when we said there are plenty of repeated elements creating redundancy? Add data is an example. You can also see all the tables previously loaded to your application. Section [2] shows you at a glance the name, type of data, number of fields, and name of the source file. 

If you click on the tables, you will see a preview of the structure of that table as shown in section [3]. This is the same as clicking on a bubble in the Associations menu.

In Section [4], you have the options to edit a table, reload the table from the source, or delete the table. The edit and delete options can also be found in section 2, again creating redundancy. You just can't miss the basic commands.