Backing Up in Advance of TCS 2 Installation

[Pinkham, Jim]

I'm getting ready to install the TCS 2 trial that arrived (at last!) two
days ago, and I'm doing so with the awareness that's there's always the
possibility we may have to revert to our present configuration. With
that in mind, what files would you advise as essential to back up in
advance? Would you also, or instead, advise a f ull system backup first?
Any insights appreciated.
 
Thanks,
Jim