Looking at this its exactly the same as when I snapped mine off. Get a very small, tiny and thin flathead screw driver and place this between the axe body and what is left of the thread and bend this inwards, once you have started this the threaded bit thats left will bend and you can then prise it out, easy peasy and if you do it right you wont damage the thread at all.
Let me know how you got on.
Phil