zorroh Hi
You may enter page class suffix assuming no-footer for specific menu item following tutorial here and thereon, add this in custom styles of JA Builder file :
.no-footer .footer{display: none;}
Note: Do ensure to add space before suffix being added while adding it in specific text field
If still unable to get the desired result, Can you add your admin details in edit fields in order for us to take closer look.
For reference, You can follow thread post (5 point) procedure.