You have to turn on developer mode by spam clicking the build number in about.
you have to turn On Developer mode first
Let's not forget the bad UX. The user has zero chance to figure out on they own, why they're unable reach those switches.
You can connect USB mouse and select with cursor.
I know on the shield it was moved. You need to click on apps and scroll down. It was renamed a bit but should be available.
Can you at least activate developer options?
Why your android is so smooth ? My bigass Sony struggles to display one menu at a time
Did someone mention a "Mouse"? I found that a track pad on a PS4 controller works too.
I found on the android TV that if you use a Regular mouse it works but never figured out WHY the controller wouldn't let me access that menu.
I have the opposite on Flauncher its NOT mouse friendly when trying to pick an app on the home screen at all it wants you to use the remote
Click build 8 times then you are a developer which means you can select install from unknown sources