Expansion plugs are all the same in that pulling them up while assembled pulls the expansion cone on the bottom up into the wedges jamming them.
Sometimes you can lift them really gently but usually it's a self locking action and will defeat you. remove the top unit, and let the cone fall to the bottom, then lift the expanding section out by finger or hooked tool. If your plug has the expanding section and top unit all in one piece it's still the same, loosen the expander cone until it drops then pull out the expanding section.
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