Option 1

The first option is to click on "Stop Process" on the notification popup that is displayed at the bottom right corner of the screen, while the exe is running.

Option 2

A second option, in case you have disabled the notification popup, is to create a batch file that would terminate the Process. 

In order to do so:

  1. Open an empty notepad
  2. Type: taskkill /f /im ExecutablesName.exe
  3. Save as SomeName.bat

By double-clicking this file, the running .exe will be terminated.

The termination can be automated as well, by running the batch file through a WinAutomation Process (using the "Run Application" Action).