Exactly this, However if you upgraded to the beta and played it, all bets are off I would assume.
not sure what you mean by upgrading, if you mean you had pre ordered then decided you wanted into the beta and payed xx more to get into it your still covered, whilst the beta is subject to change etc its not a full game, and therefore does not count as delivery and means your still entitled to a refund. (this would be my interpretation, a beta is not delivery of the full product, therefore the pre order has not be delivered upon)
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