Try open inspector on it (by halo menu alt+shift+click on Mac). And then you can evaluate:
self delete. or World removeMorph: self 2017-02-22 14:12 GMT+01:00 Raffaello Giulietti < raffaello.giulie...@lifeware.ch>: > Hi, > > after 3 minutes working, I'm in a situation where a System Browser window > cannot be closed. While the button is there, with tool tip and visual > feedback, clicking it simply does nothing. Minimization and maximization > still work. > > Is there a way to force a close? > > >