Actually, rather than remove the jisu file altogether, copy and paste somewhere for safe keeping, then right click on the jisu file and edit with notepad and delete and create empty (fake jisu) file to please the application. If you are using 360 without a loader, you'll need to go through the registry and remove a lot and Humming Own taught me to lock down the reg files.If you remove the jisu file *complately* you will be left with this rather bland skin(less) - not all that bad, considering one might want little colors.
Otherwise, you'd need to find a skin from another way, but arctic foxie doesn't recommend it, although I DO change my skin from an early build, because, as you can see, I use the classic theme on my XP so the blue looks out of place ... at least to my eyes.
Still hoping there will be some updates for us, but, sadly, I doubt it and V13.5 appears to be our last hope for this.