Upgrading to Kingdom 2015 This section summarizes the requirements and changes involved in upgrading to Kingdom 2015. What It Means To Upgrade Kingdom 2015 is not compatible with previous versions of Kingdom. Once you upgrade to Kingdom 2015, any existing project you try to open with Kingdom 2015 must be upgraded and once upgraded projects are no longer usable by any previous version of Kingdom. This means anyone who needs to access a project upgraded to Kingdom 2015 requires a Kingdom 2015 license. For more information about upgrading, see the Related Topics links below.