Belarc Inc. does not officially distribute a Portable version. They offer a standard installer. Consequently, "Portable 24 Hot" is usually a repackaged version created by third-party enthusiasts. This carries risk.
If you need to know "What do I have installed and what are the serial numbers?" Belarc Advisor is still the king in 2024. Just don't expect a pretty interface. belarc advisor portable 24 hot