When you login using an older client you will receive a message that an update is available.
Click yes to allow the upgrade to the newer version. When you do, you will receive a verification message, click yes to continue installation.
Once the upgrade has completed, open the Global Protect app and enter vpn-staff.bradley.edu for the portal name and click Connect.
Enter your BUnetID and password then click Connect.
You may delay the upgrade, if so, you can go to the file dropdown menu and select check version. It will then ask you if you want to upgrade to the new version. If you delay the upgrade, your older version will work for the time being.