This is a tricky thing, not obvious at all. It won’t let you Extract from Image until you tell it which library to put it into. You must first open a library, and then Extract from Image will be on the + menu.
There is no + there , the one you see on the right is the add ellements. The "+" for capture is usually on the bottom left . Its not there. I have even reinstalled photoshop ,still not there. I was using it a couple of months ago and it was working