THIS ISSUE HAS BEEN RESOLVED IN TURNINGPOINT 5 FOR PC VERSION 5.3.
An 'unhandled exception error' containing the details:System.NullReferenceException: Object reference not set to an instance of an object occurs when a user opens PowerPoint Polling.
This issue is caused by having the SMART Ink Aware Add-in installed with PowerPoint. This add-in conflicts with the TurningPoint software.
Update to the latest version of TurningPoint 5, available for download here. If the user cannot update TurningPoint, remove the SMART Ink Aware Add-in in PowerPoint: