How do I downgrade back to v7?

I don't like change. I don't like how learning a new interface messes with my workflow and productivity. But... I decided to give v8 a chance. It would have been nice if you had warned me that it's basically in beta. In just the first few minutes, I found several deal breakers. I can't move fields. It doesn't work with the browser extension (I don't like the full browser version). I can't collapse tags. I can't send to window. I've also noticed a number of annoyances. And what's with the database icon?