hello i finally understand how to do it, so i will post here so people that dont usually use the flirc_util.exe can do the same.
To enable and disable flirc on your PC go to start, execute/run/search (depends on your windows version) and write
CMD
it will open command prompt window, then write
cd your-flirc-directory - in my example i write cd C:\Program Files (x86)\Flirc and press ENTER
then you write
flirc_util.exe record toggle - at this moment flirc is waiting for you to press a button on your remote, choose the button you want to enable and disable flirc, and voilaaa, you can now enable and disable flirc by pressing your selected remote button