I have reported this as a bug but haven’t heard anything back.
Everytime I click on the settings button, superlab crashes and hence I can’t change the location of stimuli, or change a number of options that are integral to running an experiment. Is this a problem with version 4.0.4? And what can I do about it?

Is this with all experiments? Does it do this with all stimulus types? What platform are you running on? There was a crash issue fixed in 4.0.5, but it shouldn’t have caused issues in the event editor.