If the application has not met your expectations, you can ask for a refund. You have 14 days from the date of purchase to do this. To request a refund, write to me at firstname.lastname@example.org. I will try to make the return within a few hours after receiving the message.
It will be very helpful if you write to me what caused the request for refund. This will allow me to know which aspects of the application I should focus on while developing it.
After the time to refund has expired, you will receive a second (unlimited) license by email. You can find out more about this in Why did I get the second key?