Mokibake'd zipfiles fixer.
The name is a pun around the Japanese term 文字化け (mojibake), which roughly translates to "Transformed characters". Since the "Transform (化け)" part is also used for fox/tanuki spirits I thought I'd try to be all smart and use "Cleanse/Purify/Exorcise (祓う)" to indicate that the software tries to undo the transformation.
What a weeb, really.
Mojibake'd zipfiles are that way due to the fact that the compression utility used to create them used JIS encoding but didn't explicitly mark it in the zip file. To fix the issue we have to explicitly mark the files as JIS encoded.
This project was inspired by the extremely useful tool "Mojibake-fixer" by ianharmon. You don't even know how much I suffered to fix those damn files before finding this tool.