>>21363
Get a flash decompiler (Google FFDec or jpexs-decompiler, decent open-source free one)

open up the swf, and then look at the shapes/sprites assets. Sprites are a combination of the shape assets (For example, a shape might be a nipple and boob while sprite will be the combination)

Edit/delete the shape/sprites, I'm assuming for the no-bulge edit he just edited the bulge sprite so it's just an invisible, empty shape/sprite.