The issue has been resolved. Please go into the Management Console on your ProxySG and update your license. Here are the steps to update the license file:
1.) Login to the Management Console (https://<ip.address.of.proxysg>:8082 )
2.) Go to Maintenance tab > Licensing > Install tab.
3.) In the License Key Automatic Installation installation section, click on the Update button. You will be asked to confirm the license upgrade. Click on the OK button*.
4.) The license should be updated. Click on the View tab and click on the Refresh Data button. You should see SGOS 6 Proxy Edition and a yes in the Valid column.
*NOTE: If you get a License Install Failed and an ERROR: Currently Installed License Key is already the most recent, then your system may already be updated to the latest version.