Some resellers of legacy software may have old versions. However, HTRI strongly discourages using outdated versions because they lack security updates and modern algorithms.
Legitimate versions require a hardware security device (HASP) or a network license key to run. Legitimacy and Safety Risks
If you need (user manual, academic overview, or installation guide for a legally obtained license), I can help summarize or explain features of the software — just let me know.
A specialized tool for optimizing tube patterns and mechanical layouts to maximize thermal efficiency. Why Version 6.00 Remains Popular