I've upgraded to 3.5.2 a few months ago. I've having a problem exporting a 30 second video mix. The exporting box pops up and nothing happens. I have it preset at Low Quality. I left it for 30 minutes and still nothing. In order to get out of exporting, I have to quit MixEmergency. I'm using a MacBook Pro 15" 2010 8 Gig Memory 2.4 Ghz Intel Core i5 Processor High Sierra
