As soon as the Run state is entered the <End Run> button is displayed along with the <ABORT> button.

In the Run State all trains are following the path and direction assigned by the user in the Stopped State (0) or randomly in the Idle state (1). 

All trains continue looping around the assigned path until one of the two buttons are pressed or if in the "Repeat Run" mode the specified number of steps have been completed. When the steps are completed in the "Repeat Runs" mode or the <End Run> button is pressed the simulator advances to the Return state (5). As in all states pressing the <ABORT> button stops the simulator and returns to the initialization screen.