In order to qualify for an upgrade to a 2014 version, you must be moving from a 2008, 2009, 2010, 2011, 2012 or 2013 version of the same software. Afterwards, to validate and unlock your software upgrade, you will need to provide the serial number when registering your new purchase.
To purchase an upgrade, simply select the “Upgrade” choice when you are configuring your purchase on the product description page for the software you want to buy. Along with upgrades to a newer version of your software, you may also upgrade to a variety of suites: