Sprite Changing/Editing

I'm trying to use Sothink SWF Decompiler to change sprites. I select nilly's hacked client "rotmg.swf" to export images from, but no images appear when I expand the directory under rotmg.swf. Where can I find the right images to edit?

I guess it won't work with nilly's client

So there's no way to make my own texture pack anymore?