The third joint tournament for the three forums, dedicated to the second installment of the Heroes series!

I also want to participate in the tournament. I've already downloaded and completed the map, but I have a question: which version should I play on? On the Hero League, it says that version 2.1 is required, but I found an English version 2.0 somewhere and completed the tournament on it – is this a problem, or not? Is it mandatory to register on all three portals (so far, I've only done it on two)?