bepinex 6 version is the regularly named one (Doesn't include bpe5 in its filename)
Get bepinex 5 version via the dll file called com.rhythmdr.bpe5oldcharacterreplacer.zip in releases
another mod for rhythm doctor, this time it actually needs a data folder
basically replaces characters with old versions depending on the custom level's version in the file
simple as that
the releases page should have be a zip
extract the zip so that the dll is in the plugins folder
and the ocrData folder is also in the plugins folder
to compile make sure to read lib/note.txt!