You're pleased with the program?
You could support the project with a donation. As thanks for the support, you will receive a registration code. Donations can be made with PayPal or with cryptocurrencies (*)
Bitcoin and Litecoin.
Please consider the effort involved in such a project.
Note for cryptocurrencies Bitcoin and Litecoin:
Please send a mail to firstname.lastname@example.org
with the transaction number so that we can generate a code for your mail address. Otherwise no assignment is possible.