The one leading to the Q project webpage? I thought that was the download link for the new version!
No, v2.1 is only available via the updater since its still being tested and worked on. On December 24, I'm releasing a full package of v2.1. Until then, I'm tweaking things, fixing bugs, and adding stuff as needed. Once the full package is released, bug-fixes (I'm sure there will be some) will be posted to the updater.
I'll also be releasing my first module on that day as well - just a linear story-driven single-player module. Nothing special, more of a showcase for Q and the scripting systems I've added to the new base module. It was originally designed to introduce my son to the game so the quests are pretty straight forward and it has a fair amount of hack-n-slash (which my son likes - he's 10). I'm currently working on adding in other elements to balance out the hack-n-slash.