Snapz Pro X?

First, I'm not sure if I'm in the good forum to ask this, if not, I apologize and I'd like to be shown the good place.

If I am at the right place, I have problem using that popular screen recording app. I downloaded the trial a long time ago, and now I just have a new fully working version that I installed, but it will now show me a bit "Unregistered Snapz Pro" ugly watermark now!

I'm not sure if this is against legal stuff, but where could I find any file that still tells the program I'm running on trial?

Thanks in advance for help!