How to cancel the new changes to Auto Attack(I died my very first game from them)

I actually died a few times in my very first game due to this change, so I had to figure out how to reverse it. Under "game" at the very bottom left is an attack move on cursor button. Just un-check it to fix the issues with the latest patch.

For the record, I play aram games. And I was vs a teemo in my first one since the patch. I bought a vision item for him, and used attack move to kill the shrooms, however it kept running me into the shrooms where before it would auto-kill them for me with an attack move command.