Change heading fonts for WPEcommerce

Hi I recently updated the WPECommerce plugin and since then all the heading fonts are not what they were before the update.
All the presentation files were moved to the child theme when wpec was first loaded a year or so ago.
The body text is still in the correct child theme font colaboratelight but the headings have all changed and are no longer colaboratelight.
I flushed the files under presentation tab in wpec but that had no effect.

It was all fine before the update.

Would appreciate any advice on where to look/change the heading fonts.

https://wordpress.org/plugins/wp-e-commerce/