WTF?

The worst 10 bucks I ever spent. Your sandbox BS won’t let me upgrade software, turns on and off my last pass when I don’t want it too and how do I shut the damn thing off? All it does is close the browser and then reopens back in the sandbox. I preferred the FREE version!

Ofcourse you can’t update software through the sandbox, that is how it is supposed to work by default.
Last Pass and avast do not have a problem with each other.
Shut down what ?

You really have to provide more information.
What os/sp ?
What exact version of avast ?
Any other security (related) software installed, or did you ?