Help with Adobe Color Color Wheel

Hello:

I am new to Adobe Color (and web design in general).  Yesterday I was working on a project, experimenting with the color wheel, but at some point, the small circles in the center that you use to choose the color ended up as one small circle on the outside of the color wheel.  So, there is one small circle outside the color wheel and it's not allowing me to drag the small circle back into the color wheel.  Also, everything is grayed out so I cannot select any options on the page.  I use a Macbook air. 

Any suggestions?

Thanks!