How do I use Deep Fritz to analyze a game?

I have Deep Fritz 12 installed on a PC.
How do I use it to analyze a RHP game I have lost?

thank you

Never mind, I figured it out.

Wow, I assumed Fritz 12 was free cause it downloaded and installed at the click of a button. But it wont let me save unless I buy it at $140!

Is it worth it to have this tool to analyze my games?

I'm not sure what version is the latest, but I found Fritz 10 at a second hand bookstore for $4 US and saw Fritz 11 at an office supply place for $10 US. That may be all you really need.