I tried to normally patch sk since it had an update, but around 90% it doesn't go further and after a long while it says:
"We were unable to download the necessary files after five attempts. You can try
running the application again, but if it fails you may need to uninstall and reinstall."
I tried patching few more times and nothing. Then I followed the instruction of uninstalling and reinstalling the game and tried to patch it again. Still nothing! I have Windows 7 and I haven't updated Java lately so that is not the issue here. I also went to steam library, to game's properties, local files, and "verify integrify of game cache" and it says that nothing is wrong there.
I patched my non-steam sk (my alt is there) and that patched without any problems and I was able to log in normally.
Anyone else having similar difficulties? Can somebody please help? Sk is my main game and I wanna be able to play it again ;__;
Found solution!