In netStartClass v4.0, the footers are managed through the Administrator account. These permissions can be passed on to Campus Administrator accounts if desired.
To access the Campus and Teacher footers, select the Project Manager in the upper left of the Account Manager.
You will see a list of all of the Administrator pages. You will notice that each of the page names is followed by a number. This number corresponds to the campus the page is a part of. The campus number can be found in the Campus Information section of the Account Manager. The Campus footer will use a name like campus_footer and the Teacher footer will use a name like teacher_footer. Select the name of the Footer you wish to edit and use the Content Editor to make your changes.