On their product page it’s listed for $24.95 that you can purchase online. Once you purchase it they will send you a code that you enter somewhere in the program that will ‘unlock’ it. Clear instructions will accompany the purchase.
@sanbuu Regardless of whether the trial works without purchase or not, people buy software to get full functionality and/or to support the programmer. If you like it and purchase it, you’re funding further development of a cool piece of software.