Scroll down to find HitmanPro.Alert (distinct from the standard HitmanPro scanner) and click the Download button.
Check the box to accept the Terms of Use and click the large Install button.
Go to the HitmanPro Downloads page to ensure you are getting the authentic, malware-free version.
Unlike the standard version, Alert stays active in the background to stop ransomware and zero-day exploits before they execute.