someone send me a messege

what is the 'official google earth'? it is in the blue bar at the top, it says download the official google earth.
Is it the latest version? is it more complicated with more pop ups?, and I should stick with my 7.0?
what exactly does it have that the old one doesnt?
does flight simulater work? cus my old one doeant.
someone send me a messege and explain it.

Message sent

"The current version is 7.1 pro. More stable and flight simulator does work."

Hi spacecowboy, you can find the official release notes for the different versions here.