new remote made a popping noise in my hand and stopped working

Maybe a capacitor let go.  One of the most common root cause for device failures (other than user damage), and the symptoms fit.  Try new batteries anyway (or if VR pro, charge it overnight with a known good charger).

Unless you know an electronics expert who will work for little money for a few hours to diagnose and repair, you probably will have to buy replacement (or maybe a warrantee replacement via Roku or store).