AlarmDecoder Keypad App V2.0.10 (Windows) Exception

I am using the keypad app on a Windows platform. I have started configuring the items for my particular installation.
Unfortunately since changing from the default configuration, when running the application and displaying the items, I now occasionally am thrown the following error. It pops up in a separate window.
Is this a known issue? Is there a workaround?
Unfortunately since changing from the default configuration, when running the application and displaying the items, I now occasionally am thrown the following error. It pops up in a separate window.
Index and length must refer to a location within the string.
Parameter name: length"
at System.String.InternalSubStringWithChecks(Int32 startIndex, Int32 length, Boolean fAlwaysCopy)
at ad2usbgui.MainWindow.ProcessEXPMessage(String Buffer, String Type)
at ad2usbgui.MainWindow.ProcessBuffer()"Index and length must refer to a location within the string.
Is this a known issue? Is there a workaround?