Getting error in Real Time Bandwidth Monitor

I am have been using the Real Time Bandwidth monitor for a couple of years.  It starts up when Windows starts.  For the past few days, when it starts up, it tells me that the interface is already being monitored and to choose another interface.  I have restarted the software, I have uninstalled and reinstalled the application with the same results.

Can someone explain to me how it is showing the interface is being monitored and it is not.  I don't have another instance running on another computer.