We had removed the "Display Name" option when we were making the transition from updating our old website to the new one, so you are not currently able to change your forum nickname. Raz is still working on other parts of the forum, making sure that everything runs okay, nothing looks wonky, and other aspects that require more immediate attention. We've considered adding back in the Forum Nickname option, but we're not certain when or how we will do so. All user's names on the forum have been changed to their game username. Hopefully this clears it up.