This version (22.214.171.124) released in May 2018 is working all fine (High Sierra, latest version 10.13.4).
It is simple, intuitive and fast..
The LED turn-off feature alone is worth the tool, as I have used cloth to (not fully) hide those annoying LEDs.
Health testing capabilities are fair, and could be improved a lot. DriveDX provides much more information and details (but it is not free, and its price may not be labelled small).
As a sidenote, MacUpdate should really update its scoring system, as the score averages totally different versions and as a result, is not really relevant...