Use a combination of these keys: Alt+F4

An other (more beautifull) solution is to make a button. Then make an "On Press" command to this button, and select Exit as the command to execute when the user press it. See the example:

Exit.jpg
Q:
When iRidium client (Windows App) is running on Touch PC's etc, there is no possibility to update the client to the lastest version automatically.You have to upload a new verdion of client from the web-site and a new version GUI from remote Transfer or by the TRL or QR-code,
iRidium Log is a window where information about iRidium work, error messages and iRidium Script logs
IR.Log ("message"); 
are output in the text format.

To open the iRidium log in Windows, click F4.