The License Code for ModbusTCP is linked to your Windows PC by its Registration ID. If you switch PCs, please contact me by e-mail (email@example.com) with your PayPal receipt attached, and I will regenerate the code for you.
The price of the License Code is $37 USD. The only way to purchase this code is via PayPal!
Once your purchase is completed your License Code will be sent to your e-mail address that is associated with your PayPal account. Thanks for your support.