Right after you've registered, you should click "forgot password?" and there will be an email sent to you to reset it, then you will be able to pick a new password. I'm not sure what's wrong with the plugin, but at least it works that way. =)
I had tried as you advised but it still did not work. I also tried register under a different name and email but still no mail was sent to me. It seems like the sending-mail-out did not work (at least in my case).
It seems you're already registered (with a chibi snake pic)! I shifted the users from the first attempt site to this one. Try logging again? If you're still unsuccessful I'll delete that user profile so that you can make a new one.