Router Inspector

I am using PRO AWE, windows 10, Matlab R2016A

If I put a router into the signal flow, then open the inspector, then delete the router, the inspector never goes away.  If I try to close the inspector the I get an error on the command line stating that the inspector cannot be found.  If I close awe the inspector stays.  I cannot close Matlab.   The only way to recover is Alt Ctl Del and kill Matlab.