Sidebar editor in TripleK2

Here the other day, I started using WordPress, with the TripleK2 theme..

There under Presentation, 3 different kind of special “K2”-features..
There were “#K2 Options”, “K2 Custom Header” and “K2 sidebar” or something.. But now, the “K2 sidebar” (or what it was called), is gone ?, and I don’t know what to do :s..

I wanna change way the different things in the sidebar come in, but I don’t know how to use the codes :(..

Hope you can help me.. I’m very new to wordpress.. hehe..