I figured out the problem. I had Google Chrome set to sign me in automatically, and I'd clicked "Forgot Your Password" on Mozilla Firefox. When I opened the automated e-mail message in GMail, it opened the Password Reset window as if I was already logged in, and that's because I was already automatically logged in on Chrome.
I was able to reset my password by logging out of WGT then clicking on the link in the E-Mail message.
I have another question that pertains to the reason I was trying to use WGT on Firefox in the first place.
Is it all all possible for you guys to fix the spacebar not working in the in-game chat in Google Chrome?