Just restarted Steam (I should note that i've already restarted PC before that and error was there), and everything went well. No idea what happened.

Steam version, steam demo b4 that After playing TM2 Canyon demo and creating account there, I've bought game itself. During game's launch game says that "Key registration failed. Internal error", activating via button "Enter key" in-game does the same. I have tried launching game...