The user previews a presentation in the Windows Explorer Preview Pane. This action causes a PowerPoint process (PowerPoint.exe) to open in the background (in the computer Processes). Due to this PowerPoint.exe process, TurningPoint cannot open because the program thinks PowerPoint is already opened.
Close the PowerPoint preview in the Windows Explorer Preview Pane. If TurningPoint still does not open, end the PowerPoint.exe process. This issue is currently under review by our R&D Team.