When ever I install shanaencoder 4.9 (and older versions) into windows 10's C:\Program Files or C:\Program Files (x86) shana is unable to have files dropped into it. This problem can be solved by installing shana anyware else. It's just something I have noticed. I have tryied this on 3 PC's and replicated the same results every time.
Please note: https://blogs.msdn.microsoft.com/patricka/2010/01/28/q-why-doesnt-drag-and-drop-work-when-my-application-is-running-elevated-a-mandatory-integrity-control-and-uipi/