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I love this screensaver, but ever since I updated my Mountain Lion (10.8.5), it no longer auto-starts at logon. I have to manually open the app. Not a big deal, but annoying and I forget to do it and the default screensaver kicks on instead. It is a lovely screensaver, I match it with a white noise app that has waves crashing and get my own private beach.
UPDATE: I contacted Support, and they were quick to respond with a solution that has worked, but with every update you have to do this again. In the Mac System Preferences, Users/Groups, Login Items, the app may be there with a yellow "!" triangle, and even if checked, will not start at login. I deleted the app from the Login Items and re-added it, and it starts at login perfectly. I have notified Support about this issue. I am on a late-2010 Macbook Air running Mountain Lion 10.8.5.
Shiphranita about Lock Screen HD: Relaxing Animated Screensaver, Lockscreen & Clock