HAHA! I tried to open the darn thing for about an hour, with no success....
But then i dropped hot solder in the screw hole, and it popped right open!
I didnt even have to touch it; it opened on its own.
To close it, i held it shut, and i put the tip of my soldering iron to the screw.
This essentially heated up the plastic around it, and when it cooled,
it was perfectly conformed!
You might want to have it open, put the screw in and use something like bent sheet metal to make the screw post shrink around the screw and not curve. If you don't, it could just expand (and make the problem worse) or it could start to tip over.