That's right, three, which is like one more than two! And it's on sale! Wow!
It's certainly been a while since the last update (nearly 2 years somehow), and I've teased some stuff about a new update for a while now, and... it's still not out. I was really hoping to get it done in time for this anniversary, but it's not quite there yet.
On the bright side though, I can fairly confidently say it should be out soon (depending on your definition of soon). There probably won't be too much in there for what I'll call "experienced" players, but it should help to smooth over various aspects of the game and, most importantly, add controller support!
So stay tuned!