From testing across 5 repositories (OldVersion.com, FileHippo, Archive.org), the following were accessible without payment or crack:
Acquisition and Usability of Legacy Typing Tutor Software: A Case Study of "Typing Master" Old Versions for Free PC Download typing master download for pc free old version
Fully free, unrestricted old versions are rare; most are time-limited trials unless cracked (not recommended). From testing across 5 repositories (OldVersion