Do I need to worry about this? I always update from the PortableApps platform. This kind of attack seems to be happening a lot lately, with Notepad++ website getting hacked last in a similar manner.
Source:
https://cyberinsider.com/hwmonitor-and-cpu-z-downloads-hijacked-to-deliv...
Original discovery: https://old.reddit.com/r/pcmasterrace/comments/1sh4e5l/warning_hwmonitor...
I think current versions are safe that are on portableapps.com but it's a situation I'm sure John is keeping an eye on.
Edit:
He's aware
https://portableapps.com/comment/263917#comment-263917
your friendly neighbourhood ex-Moderator and developer Zach Thibeau