As for EU consumer rights, look at Article 16 (m) in the link you posted:

> Exceptions from the right of withdrawal

> Member States shall not provide for the right of withdrawal set out in Articles 9 to 15 in respect of distance and off-premises contracts as regards the following:

> [...]

> (m) the supply of digital content which is not supplied on a tangible medium if the performance has begun with the consumer’s prior express consent and his acknowledgment that he thereby loses his right of withdrawal.