We do not have a download file for the latest version (21.4), but you can try downloading it from the developer's site
Download version 17.0 from Software Informer
Scanned by 6 antivirus programs on Sep 23, 2026.
The file is clean, see the report.
Version: 17.0 (x86)
Date update: May 19, 2015
File name: chemax170.exe
Size: 2.8 MB