When running installer for BOOST, CHILL or SWITCH on computer with Windows 8 or 10, Windows SmartScreen kicks in (if you have not disabled it). It displays a wide strip like below (may be of different color), with the message:

Don't worry! Just click "More info" link there, and you will get screen like this:

Notice that it gives you name of the publisher ( Alexander Tsodikov is CEO of HiAlgo Inc.) This means that this installer is digitally signed with a valid certificate.

So fear not ☺! Click Run anyway button to install your favorite app.