LimbSolver2D missing "create effector" button


Shouldn’t there be a “create effector” button where there is instead a disabled “create target” button?

I was following this tutorial by Brackeys which apparently uses a not-yet-released version of Unity. In the version I am using (2018.3.2f1) you drop the effector in and use the button to create the target (opposite of what was in the vid).