Home Depot Design Center has closed its doors on Rockville Pike, ending a five-year run at the Montrose Crossing shopping center. The Design Center was a reboot of Home Depot’s defunct Expo chain, opening during a pandemic-fueled boom in home upgrades. The store offered two floors of luxury kitchen and bath showrooms, stocked with a large array of premium appliances and fixtures. Only three of these Design Centers ever opened nationwide — and it appears the other two are also gone. Customers with existing orders or projects are being redirected to Home Depot’s main website. The Design Center is the second major tenant to exit Montrose Crossing this month, following the departure of bankrupt Value City Furniture…