Time Machine Functionality

Recently had a storm here and fearing a lightning strike, I closed all my programs, shutdown my new MacPro and after it was full down, unplugged it.

On the way I must not have saved one of my documents because I now can't find it. So I want to use Time Machine, which I've never used before.

I click on the TM icon at the top of the screen and enter TM, where I navigate to finder for the last save before the storm, but then I cannot access any of the functionality of finder by clicking on, say, the documents folder.

At the bottom of the screen there's a "restore" button, but I'm concerned if I hit it, I'll lose everything I've done since Wednesday night, which would be just as bad as losing this document.

Can anyone guide me through this?