Free again for anyone who wants to get it for any recent shucked drives, slightly newer version as well for those who got it in the past and missed the recent freebie deals
Also for anyone who wants the lattest edition ( Update History )
Hard Disk Sentinel PROFESSIONAL - Lifetime Upgrades v5.61 ($14.97) USD
Hard Disk Sentinel PROFESSIONAL Family license - Lifetime Upgrades v5.61 ($26.50) USD
EDIT - Seems the buy now link is having issues but havce no fear, direct link is now here "no product key needed provided you install before 10th Sept"