The designer named his contemporary collection, which was launched in 2011, Derek Lam 10 Crosby. That’s in the past, in a case of the proverbial door closes/window opensT the company — after securing a minority investment from Sandbridge Capital LLC in January — is moving forward with a focus on domestic retail: The first store for the Derek Lam 10 Crosby line, to be located at 115 Mercer Street and designed by William Sofield, will open in November.