Ok so I clicked on Spiral Knights (Simple). It patched some update, then validated, right after that I get this message: The application has failed to launch to this following error: Resource temporarily Unavailable: recv failed. What does this mean?
Probably from the server being overloaded or you were grabbing updates at the same time they were adding the new files. If it didn't clear up after 30-60 minutes, then you'll need to look at the launcher.log to see where it stopped.