Icon options in visionaire build game

Hello everybody, im giving the final touchs to the demo of my game, i was testing the build game option in visionaire, and theres no option to select a custom icon for the executable file, and i only know how to change folder icons not file, is there any way to do this? put a custom icon on the game executable?

Thank you

Windows: with an Resource Editor it gives many here.
Mac: overwrite the icon file in .app/resources/ folder.
Linux: just deliver png files with different resolutions.
iOS, overwrite the icons and launch images.

I use this application:
https://iconverticons.com
Which convert icons directly for each OS.

Thank you but my problem its not converting to icon, its Changing executable icon, thats what i dont know how to do :-(

http://www.angusj.com/resourcehacker/
or
http://icofx.ro/

Oh already did it :-) thank you