Users with PB Administrator or PB Superuser profiles can access the Setup area.
Depending on the configuration of your ORG the setup area has different appearances.
The Propertybase Help Center is always displaying the screenshots on the most current Salesforce approach. So if your screen looks different, please don't mind, it´s easy to adjust:
How to reach the setup area? Click on Setup in your Menu.
To enable the current user interface: Go to Setup> App Setup> Customize> User Interface
Select checkboxes in front of "Enable Enhanced Profile User Interface" and "Enable Improved Setup User Interface".