I just bought the Vine Viewer (Vine Server comes with, but is free, open source apparently) 19 days ago. I had hoped they would be nice enough to give an upgrade for free too. Was not the case yesterday so I bought the upgrade cause of the full screen feature and promise of higher stability. I'm glad I bought, and upgraded full screen rocks! Also just got an email that says I get a refund too cause of an oversite on the developer's part for a 30 day free upgrade period. So, I'm happy as a clam!