[EDIT] - It has been reported that "Atrium Windows and Doors" now answers the phone as "Prime Window Sales" and no longer do after warranty work with residents - only builders. They suggested that you call Glass Unlimited: 720-427-4085. The metro district has not worked with Glass Unlimited, it is the recommendation of Prime Window Sales.
There have been questions about the Warranty for windows in Newtown Homes (the original builder in the community). Here is a little info about the window warranty.