I've been using the Forward button to stop the train so far...if the train is moving - the forward button will cut throttle and slow to a stop.
Assuming E-Stop is bit more abrupt! But good to know there is a way to kill track power when changing locos.
Another thing that might be slightly confusing - putting the Max Speed and E-Stop under "Advanced Features" - what is more advanced about those features compared to others?
And since Explorer users are using the Free Version - "Advanced" sounds like something that is for the Pay versions - so I might not even try that dialog...assuming it will lead to an upgrade prompt.