Upgrade to SolidWorks 2013 from SolidWorks 2007

Hi everyone, I'm a newbie here.

My friend has SolidWorks 2007 installed in his workstation (without subscription).

Now he is thinking of upgrading the software to the latest version of SolidWorks, which is SolidWorks 2013.

Is this possible? And may I know the procedures/steps?

Thanks guys!!

SolidworksGeneral