I just want to cancel limewire, does anyone know how I go about doing this?

Cancel? Simply stop using it !

If you are receiving continual billing then it is NOT from the official site, it would be via a scam site that you accidentally signed up to. Known Scam Sites (click on link)

I have two separate folders, one folder is where all the files I download from limewire are stored, the second folder is where the files go after they have been reviewed and properly tagged. I like to share all of my music so that it's just a little easier to find some songs that others may not have, however, when I shared my main music folder, my limewire library got filled with thousands of songs and it's mixed in with the one's that I haven't reviewed yet.

I'm simply asking for a way to view separate shared folders within limewire so that I don't have to search through thousands of songs in order to find the one I just downloaded to listen to it and make sure it's not corrupt and has a decent bit-rate associated with it.

Skin changer allow people to choose a skin for limewire

Too late, you can already change skins.

However, as LW no longer officially exist you're going to have a very long wait for any improvements.