You can force close the CBS All Access app using these simple steps:

Using Siri Remote
  1. While on the Home screen, double-click the “Home” button on the Siri Remote. 
  2. Swipe to the right on the touch surface to find the CBS All Access app.
  3. Swipe up on the touch surface to force the app to close.
You can now relaunch the CBS All Access app!