What you are seeing is the new look that they gave it in 2.3.
I would think you could get the last version having the other search interface if you just ask them for it. I don't like the idea either. I hope they make an option to have it either way. I think the last version to have the other search thing is 2.2.4, but I never got that one, so I can't be sure. I do know that it was the same up to 2.1.3 at least.