Extract in BepinEx\plugins\COM3D2.MaidLoader.dll and replace the existing .dll, only IF you were using MaidLoader before. Don't install it if you are using ModLoader.
Note: From 2.38.0 onwards you need to update MaidLoader from
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. This version contains critical fixes for 2.38.0 but dance subtitles won't work.
You need a separate LoadDanceSubtitlesDatas.cs script to get the subtitles timings to work (included in latest translation packs).
It is pending to be included in CMI in a hotfix update. If you used ModLoader it is likely busted with update 2.38.0 and nobody maintains it.