How do I use the WMpotify mini player?

Everything in the mod is working fine but the mini player, it still looks normal. I am on windows, what do I have to do in order to match the rest of the mod?

The issue names no file, test, or entry point. First determine how the WMPotify mini player is enabled on Windows and whether the required steps are documented; done means a newcomer can follow those steps to make the mini player match the theme.

Written by the indexing model from the issue text.