I read the original pinned post, but am unsure what the steps even mean. I really want to update my playlist but am not sure how to proceed with these instructions.

TAKEN FROM THE ORIGINAL POST
"1) "ok, i convert my song. How do i put it inside the game?
now if you haven't delete the template yet, go into the true music template and add the converter again, the files you need to add is :"

My Question - Once I converted the files into .OGG files, do I paste them in both TCBoombox & TCVinylplayer folders?

2) Then run the "AddYourMusicToTheMod.cs". and delete the files & folders above again.

My Question - Why do I run the .CS version instead of the EXE for
AddYourMusicToTheMod? When I open up the .CS, it opens up a coding program, Visual Studio Code, and not sure what to do at this point. What program do I need to open the .CS file?