hrm. considering that response, it seems you're just a little too newb to be updating your device software with a beta.
I figured it out...
I hit the green send key. From within that screen, I selected Options and then General Options. I then disabled "Dial from Home Screen". Once that was done, I went back to my home screen and typed "O" for Options. From there I was able to switch themes, and recover my Options icon.