Yeah, the Sugino Autex auto-extractor is supposed to let you auto-extract the arms with just a hex wrench. They did not always perform as designed. I don't remember specifics, just a vague memory of seeing a couple of problems on repair bikes and swearing to myself I'd never use one on my bikes.

If you can get a pin tool of some sort to let you back out that outer plate, then you can just pull the bolt and use a regular extractor. Problem is that plate is thin, they like to get stuck, and if they're tight/stuck a pin tool may just tear up the slots. They did ship with a little insert of some sort to install the outer plates, with tabs that correctly fit the slots.

Proceed with caution.