People who steal are going to steal. And people who support small developers shouldn't be forced to jump through hoops everytime they set up a new system or trash their prefs. So we're on the honor system here. There are no license keys or registration files to keep up, with but there is a lot of misfortune that may befal you for software theft. Fair warning.
A tool should enable a skilled human to do their work better or faster than was previously possible. A tool should inspire, be a joy to use, but also allow the hand of the artist to be seen. Humans make work great, not tools.