Interesting new addition to Westfield Montgomery mall this week: Yvonne Ex, now open next to Lenscrafters with a dazzling array of clothing and accessories from Ghana. This is the first U.S. venture for owner Yvonne Tawiah, who produces her own tie-dyes and batiks for men and women. What else is new at the mall this week? Clothing store Windsor has opened its doors in the Old Navy wing, Kicks USA has changed its names to Snipes, and Shilla Bakery will now be known as Syd’s.