Using the tabular CDB introduced at VE 2012 Feature pack 2, material properties (including name) are edited in the Project Materials dialog so that changes can be applied to any/all Constructions that reference the Material.
Once you click on Constructions Database (CDB) you will see the following:
Double click the ID of ‘External Window’ for the below:
Click on Project Materials(bottom left) to show:
Double click on the Description of the Constructions you want to change. Change this then click out of the description box and close, this will then show the following:
Select the ones you want to change then press ‘OK’ and Save the changes:
'OK' the construction and CDB and exit, the glazing will now be changed