how to find the current version of gnome

Type

gnome-shell --version

in a terminal

Your gnome version is 3.4.1 and is alright.

But you have to make sure at the time of logging in--that is, at the beginning of the session--that you select the "gnome" desktop environment among many. The other options may include:

• GNOME Classic [which provides a "GNOME Fallback" session]
• GNOME Classic (no effects) [which may provide an even lighter weight GNOME Fallback]
• Ubuntu [which provides Unity]
• Ubuntu 2D [which provides Unity 2D]

When you log in (when the machine boots up, or even now by closing all applications you can log out and again log in), there is a small round symbol on the right hand side of your user name on your log in dialog box. By clicking over it you can find a drop down list of options. Select GNOME.