Channel Window has No Okay Button, Audio dropping out on export, can I downgrade my project file?

I have the 15.1 Mac version of Premiere Pro and I wish I had not upgraded. First thing that is happening is that if my media is variable frame rate, the audio just randomly dropps out completely on export. The advice I got from the forum was to use Handbrake to encode it first. I didn't have to do that before and why I should have to use a third-party app now, I don't know. 

Second if my audio is only on the left track or the right track, I used to be able to right-click on the audio timeline and remap the channels. Now when I do that I can remap the channels but there is no okay button so it won't do it. 

I would downgrade but an important project I have moved forward. Is there a way to save the project as a lesser version so I can go back until this stuff is fixed?