@Yoni, thank you for reporting this.

Please try again. It should work now.

@Alisson-Teixeira, I translated that as:

"I would like to know if it's possible to turn off the monitor and the computer at the same time with just one command? In the free version? With the example command, the monitor enters power saving mode, but doesn't turn off completely...

Question for Windows please"

You can run multiple commands in one command by putting && between commands, like this:

nircmd.exe monitor off && shutdown /s /t 10