Download here: http://tinyurl.com/pqpul8y
If a new League patch comes out, it would be safe to close Dargon from the system tray before patching. I can't say much about SIU since I don't use it often.
Also, back up the folder "lol_game_client" in case something breaks while patching. Just close Dargon Manager (exit it from the system tray), place the back up folder back into original directory and then patch.
After patching, back up the folder again, then open up Dargon Manager again.
- It may just be me, but Howling Abyss doesn't work for me when I have the mod on.