Having problems with music update

I'm having a problem with the music update and I CANT find it ANYWHERE unless the creator helps me find it

what exactly do you mean?

Having looked at your followed topics I think I know where you are confused.
That person was suggesting an update, it hasn't actually been added to the game yet. As of now there is no way to add custom music in quick mode tracks.
However, you can always download the track image, upload it to complete mode, and redo the collisions if you want your quick mode track to have custom music ^^