I've been using xLights on another Mac, but just installed .33 tonight on my iMac. I have been editing a good bit of a song. Everything in the Master View window, (with the timeline) is working, but I can not click in the Effect Settings, Color, or Layer windows. I also can't use the Effect tools menu (icons) or the menu at the top. I can use my Mac Application menu. Very weird. I linked to a screen capture. I was able to save using the main App menu.
http://fbcjennings.com/wp-content/uploads/2018/09/xlights-prob.mov-Derrick