I pre-ordered the game about a week about since I loved the original and the newer version looks wonderful and worth the money since I had poured hours into the alpha version. When I first got the game everything worked fine, I played it for a couple of hours and I was looking forward to playing it more later. But no, "Failed to download data file" is all I got from unity. I cleared my cookies and then the game loaded fine, and I played for longer, figuring that I would have to clear my cache every time that error comes up, not too big a deal. But then that fix never worked again. I cleared every file that I know of that's connected to unity to uninstall it, but re-installing didn't work. I can play other unity games just fine.
I use chrome as my main browser, Firefox won't even recognize that I have unity installed (it has the install unity button, and it never goes away no matter how many times I re-install), and IE says "Invalid Data File" whatever the hell that means. I don't know what the is going on, I've spent way to long trying to fix this, and I am frustrated beyond measure.