How do I approve Customers that require approval?

To approve customers, browse to "Reports" > "Customers". By default this will show you all customers who have registered today. You can use the form on the left to search for customers. Once you have found the customer, click the manage menu and then select "Approve":

This will open up a modal window for you to confirm. Click the "Approve" button to approve the customer:

The customer will then receive an email to advise them that their registration has been approved.