It’s been two decades since Natalie Merchant parted ways with her longtime 10,000 Maniacs bandmates and released her first solo effort, the 1995 multi-platinum selling “Tigerlily.” Both she and the songs from “Tigerlily” have matured and changed together, so last summer Merchant re-recorded the 11 songs with different arrangements, inspired by how they had evolved over time in live settings. Merchant, in her only two East Coast appearances, performs at the Beacon Theatre, 2124 Broadway at 75th St. Mar. 28, 8 p.m. Tickets are $39.50 – $79.50 at beacontheatre.com.