This one had me completely buggered for a while when I first started playing with cars many moons ago too
The winder is held on with one of these
And to get it off you need one of these... I call it "the thingy" available from panelbeater's supply shops
Or alternatively, get a tea-towel or something like it, hold two corners, pull it tight, and work it up underneath the handle until it pops the circlip out.
And swear a lot. That helps. :y: