According to Article 16 (m) of Directive 2011/83/EU and § 356 (5) BGB (German Civil Code), the right of withdrawal expires when:
By completing your purchase and initiating the download, you explicitly agree that we may begin delivering the digital content before the end of the withdrawal period. You acknowledge that you thereby lose your right of withdrawal.
If you do not agree, please do not complete the purchase or download the product.