How to change uTorrent skin and themes

Like many other apps we use today, μTorrent lets you change themes and skins. In the μTorrent preferences,
however, you will not find the option. You can find a good collection of skins at
How to use manually downloaded skins
If you have a .btskin file, double click it, or drag 'n drop it into µTorrent and you're done! If you're downloading from our skins page, click the Download Now button. Copy the file(s) to %AppData%\uTorrent (paste this path into Explorer), then restart µTorrent.

How do I go back to the default skin?
If you're using our skins app, then it's easy! Open the app, go to Default Skins and click on the one you want. If you're using a manually downloaded .btskin, then either use the app or go to %AppData%\uTorrent and delete current.btskin. If using files from our skins page, delete the .ico or .bmp files in the same folder.