Update causing issues

I have just updated my Catch Responsive Pro theme to version 3.7. It is saying my child theme is now broken, and so I've had to revert to the parent theme. When viewing my site live, my pictures and text in both the featured content and featured slider are not there, however when I go in to customise them, they are there within the customise view. If I make any updates, save and come out, they've then disappeared again in the live view and are replaced by images that come with the template. Firstly, what have I done wrong when updating the theme? I thought that if I had chosen a child theme, I just had to update the parent and everything would be fine? Secondly, how can I now update my site so that what I see in the customise page is the same as what will be visible in the live view. Thanks David