You can find the files and installation instructions on the official website
Will I get VAC-banned for using Simple Radar?
No. Simple Radar is NOT a third party program or considered a cheat. It’s simply a modification to your game files similar to updating your config.cfg for game settings or styling your HUD.
Will this get me banned on FACEIT or other sites?
NO, it will not but if you are participating in professional tournaments, please be sure to check the rules for entries about “Custom Data”. In IEM tournaments for example, you are not allowed to change the HUD.