According to End-User License Agreement
5. All charges incurred when purchasing download DCS products from the DCS Store cannot be refunded or exchanged in whole or in part, regardless of the payment method.
If you have purchased a product from the DCS e-shop and the product then goes on sale (even an hour later), we are unable to provide any refund or price adjustment. All e-sales are final.
European and UK law principally provides a right of withdrawal on software sales. However, it can be and typically is excluded for boxed software that has been opened and for digitally provided content once it is provided to the end user. This is what happens when you make a transaction on our E-Shop: The EU/UK statutory right of withdrawal ends 14 days after your purchase or the moment you start downloading the content and services for the first time (whichever is sooner).