Lost the Rock Bank Child Theme when Upgraded to My Music Band Pro

I do not understand what happened but I started out with the free wordpress theme Rock Band which ended up automatically setting up Rock Band as a child theme for My Music Band. This would not allow any color changes or other customization so I upgraded to My Music Band Pro which is what it recommended for more customization. However when I upgraded to Pro, I lost the Rock Band child theme – WTF. This is crazy!!! Does anyone know why – if so – please help! Otherwise I will be trying to get a refund or I will make sure I give a BAD Review!!!