While IObit Unlocker is not portable, IObit Unlocker Portable is, and it's much more updated (as in years, sometimes more than a decade) than most of what's in the relevant category.
Please consider voting for it to make it a public entry.
Submit portable freeware that you find here. It helps if you include information like description, extraction instruction, Unicode support, whether it writes to the registry, and so on.
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