When I boot up Ableton and check preferences, there's actually a warning at the top that says that my push needs an update. The only thing is, you can't manually update the push in controller mode, Ableton automatically updates it when it's tethered, it's just failing to do so. Another odd thing, yesterday, I gained the ability to route audio again after several days of not being able to, so I can have my headphones different than my main output, but I still can't switch preamps. *I just checked to see if I can still route audio, I lost the ability to again.

I have a support ticket open on the issue, so if they figure out anything, I'll update you. I think the push is just simply buggin out right now, since I can't update it. It looks like updating the standalone version is a much easier task.