Voly

Basically what i do to change my name is put my mouse over my name (top-left), click "personal details" (also top-ish left). One i'm there i scroll down looking at the options posted on the left side of the page and "Change username" is just under "advanced options" at the very bottom You can get there by doing almost anything (Personal details, signature, etc) but i just do it this way cause yolo.