Crippleware on Windows always used to amuse me. Oh you've disabled the button because I haven't paid? [poke]...[poke]... There now it's enabled again. Oh, you forgot to check if it should be enabled when processing the click event? Tough.
If you're going to pirate the software, you might as well go ahead and pirate the full version; then you won't have to poke at it.
OTOH, if you're going to legitimately use the software, you ought to pay for it.