Licensing Balsamiq Wireframes for Desktop saves locally to your computer, no Internet connection is required. The app comes with a fully functional 30 day trial. Afterwards, you'll need to buy a license to edit your work. Viewing files remains free. Updating Minor-version updates (4.x) are free. Simply download the latest version and install it on top of the old one. You won't have to re-register
![Balsamiq for Desktop - Fast, Powerful, Offline Wireframing | Balsamiq](https://cdn-ak-scissors.b.st-hatena.com/image/square/81ef7fdd54aa64747b7548af87512879d469cf6f/height=288;version=1;width=512/https%3A%2F%2Fthumbs.balsamiq.com%2Ft_wireframes_desktop.png)