Reporting an issue I had with Premiere 12.1... When I would try to export a video, I couldn't adjust any export settings. When I would click the dropdown menu, for example, to change from H.264 to Quicktime, the dropdown would not appear. I tried sending to AME as is, and then use one of my presets there. I still was unable to adjust any export settings. The screen would just flash when I would click for the dropdown to appear. And then when I would try to render AME would lock up. A colleague suggested reinstalling the apps. So I removed them and reinstalled, twice, to no avail. Eventually I rolled back to 12.0. I'm on a mid-2012 mac tower, running El Capitan. Locked into El Capitan on this system because our DVD duplicator will not support past El Capitan.