We hit the go button a little too early this morning, and for a period of about 10 minutes people were able to download something that's not the final build. You should uninstall that and delete the download - we'll have a fresh, working download later this afternoon (US west coast time). Thanks for your patience, we can't wait for you to play the episode!
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@puzzlebox posted some official info recently
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Same. Numerous errors validating my account, but that finally went through. Now, I show the game in my library, but can't access a download.