Actually, it does extend to digital goods but that comes with the added stipulation that the buyer does not get the goods before the 14 day period is up, so there's usually a mutual agreement to waive this.
It should also be noted that during these 14 days, you're not technically refunding so much as undoing the contract, and the buyer does not have to provide any reason for this.
The 2 year period isn't legally a warranty, either.
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Well, since it turned out there wasn't actually any noteworthy change, obviously it isn't.