My Yahoo Mail Is Weird.....?

When i was trying to sign in yahoo mail, there was this thing that kept on popping that i needed to intsall something, and my dumb self clicked on a thing that said "Use Old Version" and now when i sign in to check my email, it's totally different and more complicated to look at, what should i do to make it to the normal mail, the one with the avatar or the greeting that says "Hello, Rudy"?? Please help me out.