There is an official version that includes:
XLSTAT is developed by Addinsoft. The code is their intellectual property. xlstat full portable mega
Pirated versions often lack the AI-powered assistant , R-integration, and regular security updates found in the official release. There is an official version that includes: XLSTAT
The official developer, Addinsoft (Lumivero) , does not offer a standalone "portable" version (one that runs from a USB drive without installation). XLSTAT is designed as a native Excel add-in that requires a standard installation to integrate correctly with the Excel ribbon and local system resources. xlstat full portable mega
It is not "portable" but installs cleanly. For many students and casual users, this free tier is more than enough.