You will see a screen that says "Enter Extension and press Enter or OK".
Enter your extension and click "Enter" (2nd white button from the right).
Enter your extension in again for the password and click "Enter" (2nd white button from the right).
After you click "Enter" you will be successfully logged in.
Find the "HOME" button. (above the "2" button)
Click the "HOME" button and use the arrow keys to scroll down to "Log Out".
Click the "OK" button or the "Select Button" (far left white button).
Click the "Log Out" button (far left white button) to confirm logging out.
You're done when you hit a screen that says "Enter Extension and press Enter or OK".