Ah, that’s one mystery out of the way. In the meantime I checked JUCE out despite being really against it so far and the JUCE GUI works just right. I did notice, however, that if I compile the plugin without an editor it still won’t create the generic GUI for VST3. The parameters do show up in the browser, so FL sees them but refuses to create the surface for some reason. I’ll check it out with the beta whenever I can, but I’d rather preserve compatibility with the folks using older DAWs anyway. I do still wonder what makes VSTGUI mess up though.