With four decades of tunes and albums to his credit, from the early Meet Me at the Crux and Thug of Love to the recent More Songs from My Cool Life, Dirk Hamilton has been a resilient, original, and consistently compelling folk-rock singer-songwriter. He returns to “The Hear & Now” to chat with Derk, sing a bit, and talk about upcoming gigs in Stockton (3/19) and the Freight & Salvage Coffeehouse in Berkeley (3/24).