The -Portable-.zip designation indicates a version of the software modified to run without a formal installation process. This is common in "abandonware" or legacy tool collections, allowing developers or security researchers to use the tool on modern systems without cluttering the Windows Registry or dealing with obsolete installers. Historical Context
Identifying incorrect Windows API calls or bad values passed to built-in functions. NuMega SmartCheck 6.2.1286 RC2 -Portable-.zip
If you absolutely must run it: