You are wrong, he is entitled to a refund for that very reason. And because the FD store has not been updated with the new law he is entitled to a refund well into June 2015:
http://www.lexology.com/library/detail.aspx?g=79dc3523-3780-4742-beae-a7c7dda97c55
"The Regulations
The Regulations make minor reforms to consumer contracts for digital content, which affect the consumer’s right to cancel and the pre-contractual information which must be provided by suppliers. These are as follows:
Cancellation: Consumers will have a right to cancel a purchase without providing reasons and without liability. There will be a right to cancellation within 14 days from the day after the contract was entered into. If the consumer was not made aware of this right at the time of contracting, but was made aware within the following 12 months, the 14 day period will run from the date of notification. If no notification is provided the customer shall have 12 months from the date that the cancellation right would normally expire (i.e. 14 days plus an additional 12 months) in which to cancel. "
EDIT: My wife has just told me (corporate contract lawyer specialising in digital law), if FD never make him aware of his rights, his ability to get a refund runs infinitely.