I recently bought Loren in the Humble Store. The version which I get from the store is 1.3.3, but when I get it through Steam or the download from this site, it is 1.2.9. Which version is the official version?

The Humble one was updated more recently, so you have the latest version which is still in "beta" on Steam (though it works fine, I'm just being paranoid!). The game is identical to previous version, the only change is an easier way to "uncensor" the game

So the 1.3.3 should work just fine even if it doesn't ask me to input my key to unlock the full content?

Yes some other users wanted a real "DRM-Free" version, that's why I did that

I see. Thanks! Hope to enjoy the game