NON-REFUNDABLE. The trial license provided by ZD Soft enables you to download and try the SDK for free before purchasing a commercial license. The free trial version of the SDK is fully functional and you can test each API to make sure the SDK meets your requirements. Once you decide to purchase a commercial license for the SDK, it shall be deemed that you have completed the comprehensive testing of the SDK and confirmed that the SDK meets all your requirements, so you have no good reason to ask for a refund. ZD Soft cannot control the copying and distribution of the applications you develop using the SDK, and cannot ensure that all copies of the SDK redistributable components that have been copied and distributed can be deleted, so ZD Soft does not accept refunds.