Um, actually, here's how it is:
currently, there is a download for a free phun. It is in fact a lot better, and it does have a cut tool and magnets and CSG operations. But if you want the best features, you have to pay, and so I'm just bummed that it's now more of a demo. But I do suggest you get 5.25, because it is much better than 4.22. Just not as good as the expensive version.