child theme not updating in classifieds press

Hi guys,

Im sure this is my error somwhere along the way but my child theme is not updating to 6.5.6.

I have made lost of revisions to the style.css file and do not want to lose them but want the core of the theme to update. I have left the version data all intact (I even achnged it to read 6.5.4 to force the update) and assumed this would find the update.

Have I got it wrong? Do my child themes need to be completely rebuilt every time a new version of classifieds press comes out?

Any guidance is appreciated.

Mark