Yeah, i guess things changed with updates to the software. i'm still with v2.1.4770 in which the skin works as it was intended to. Unfortunately, I no longer have the time to update my skins, though i'm sure it is manageable to anyone with enough will and time.
Can't really help you with the Library Explorer right now. my advice for you is to keep halving the code, until you finally see a change in the element you're looking for. minimizing the code until you're left with just a few lines, one of which for sure will change that element.
This has been discussed before. if you'd like, you can run a forum search and read all about it. The gist of it being, that while everybody agrees it's a good feature to have, it's not as easy to implement as it might seem and time can be better spent elsewhere.