Mockups 3 for Desktop has now been replaced by Balsamiq for Desktop.
What's new? The BMPR file format is the same, so your old projects will continue to work fine. The new version is native (no more Adobe Air!), faster, and includes new features like a new full-screen mode, and built-in commenting.
You can still download Mockups 3 for Desktop here or read the Documentation here.
If you have an existing Mockups for Desktop license key, you have the option to purchase a Balsamiq for Desktop at 50% off the regular price. You can purchase your major-version update license by pasting your Mockups for Desktop key on our pricing page.
If you have any questions, please email support@balsamiq.com.