I think screenshots are very helpful. They are much easier to follow than instructions like "look at the top-right of your screen; find the word just below the red box; click that; on the new screen, find ..." and so forth.
As for going out of date, it helps to include caption with the date of screen capture and the version number of the software.
My only problem with screenshots is that they sometimes show the whole screen, so the text is quite small. An exploded diagram (full view on left, with a box in it for the focus, and the focus view on the right) can help a lot. We who write manuals for software ought to take some hints from those who write manuals for car repair, etc.