What will happen if I update my itunes into itunes 11.0.1?

I'm trying to update my iphone3gs to ios 6 but everytime I click update, it says it requires itunes 11.0.1. Should I click download? Coz I got traumatize when my friend clicked something on her itunes and now her iphone is not working anymore. I'm only new in using apple gadgets.

Itunes 11 is identical to 10 after you reset some old settings.

In the top left corner click the little icon, then click Show Menu Bar.

Click on View > Show Sidebar

Click on View > Show Status Bar.

Your screen will now be just like it was in Itunes 10.