Tried the demo -  very impressed with even just the first few interactions. By the time the timer ran up, I knew I was gonna buy it. 

Timer is a slight inconvenience that serves it's purpose well. If you get lost in the settings, you can keep playing around and just relaunch to see the results/keep live editing.

Perfect way to do a demo. Feature complete, and if the trial end is becoming an issue, it means your enjoying and using the product beyond just a try-out.