Version on site is 3.0, compatible with 32-systems only. Also, it's 2003.
Archive.org also have v1.2 (1998), compatible with Win 3.1. https://archive.org/details/Interactive ... 31-Mac_Eng
And v2.0N - Nervous System Edition of 2001 (Win3.1 compatible too). https://archive.org/details/Interactive ... manAnatomy