To bring up a list of clients that have an open balance follow the below instructions.
From the BusinessMind home page click on contacts.
Choose to make a smart set under contacts, you may also need this same smart set under organizations with you sell to companies as well as people.
Name your smart set as per your need something like Contact Open Balances would be great and Org Open Balances for organizations.
Add the Balance column and any others you require
Set your search criteria to "Balance is greater than 0" then Save your smart set.
You can save this and run it at any time. In addition you can use the download option to download your data into your favorite spreadsheet program.