One29, an Elm Street restaurant featuring American contemporary cuisine and located the former Chef Luis space, has closed after a months-long run downtown, according to a worker at the eatery. The restaurant stopped operating as One29 on Sunday, according to a man who answered the phone there, but has remained open under new auspices. Baldanza is moving up from “the alley” at 17 Elm St., and now is operating in the larger space, the worker said. At least some of the One29 staff is staying on with Baldanza, he said. According to a post on Baldanza’s website, that restaurant will officially open Sept.