There's a big difference between a launch and a pivot/relaunch: http://techcrunch.com/2013/11/07/social-network-at-the-pool-... The title as-is implies that this is a completely new app.
Again, there needs to be a clear guideline for how to use Show HN in submissions: should it be used to showcase a cool project, or should it be used as a form of Hacker News-friendly SEO for veiled product announcements?