Closing the editor window caused problems...
I pushed the red close button at topLH corner of window, then tried under "Window" menu to "Reload" , and the app threw error (see below). Could not quit the app via "app.1999"/ "quit"command... So i had to quit the hard way (ctrl/comd/esc keys) and reboot.
Good news is: this appears to have resolved my "Keyboard Anomalies"(see earlier post)... So now i am back to editing in the Mac app! (happy :-)