Do not do it. The security risks—malware, data theft, ransomware—far outweigh any convenience benefit. Legitimate REFPROP licenses are reasonably priced, and the peace of mind that comes with legal, malware-free software is invaluable.
The program runs without writing to the Windows Registry.
To use the REFPROP Excel Add-in (e.g., REFPROP.xla or REFPROP.xlam ) portably: Open Excel. Go to File -> Options -> Add-ins. Click "Go" next to Manage: Excel Add-ins. refprop 9 0 portable
REFPROP relies on finding its fluid and mixture databases relative to its executable file.
To use REFPROP functions inside Excel without installing the software globally: Do not do it
However, this does not mean running REFPROP portably is impossible. The software's architecture—specifically its reliance on DLL files and a folder-based file structure—makes it amenable to portable use.
Copy the REFPROP.XLA or REFPROP.XLAM add-in file into your portable folder. The program runs without writing to the Windows Registry
This article explores the utility, functionality, and proper usage of a portable REFPROP 9.0 setup. What is REFPROP 9.0 Portable?