Switching to Pro

If I decide I really like Unity while working on a project and I want to switch to Unity Pro. How easy is it to just change over?

Thank you!

Once you purchase Unity Pro you will be given a new serial number that you need to activate. You just open Unity and in the menu go to Unity->Enter Serial Number and input your new code in order to activate the Pro functionality.

You just activate your serial and your done.

There's really nothing to "switch" to. Unity and Unity Pro are the same app.