Alright, as you may know (If you play on Steam), everytime you open up Spiral Knights, there is an option that says "Use Steam Account" or something like that, but starting now when I open Spiral Knights on Steam, it doesn't seem to have that option. Even if I try logging in using my username and password, it'll say "This account has been converted to Steam. Select "Use Steam Account" to login." But there is no option for that, any help ~ ?
I tried restarting it dozens of times, and I even uninstalled it and re-installed it. No help.
If spiral knights doesn't detect the connection to the steam client it won't try to log in via steam. Try restarting the steam client (and make sure you are launching spiral knights from the client)