Everything that is related to software activation and serial key should be handled by the developers themselves because they have access to your details, payment and everything that is related to the availability of the product.
Because of that, I recommend checking the following link from where you can get in touch with them: http://www.esignal.com/contact-us/
Make sure to provide all the identification details and also specify that you want a new key for the software and it you are eligible or not.
