Problem Upgrading to Pro version from a free version child theme

Hello, I have acquired the pro version of Catch Full Screen. Before that I have build the site using a child theme created from the free version (using the Child Theme Configurator extension). Now that I have installed the Pro version, my child theme still says I need to upgrade to Pro. I tried to export my settings from my child theme with your Catch Import Export, but of course, on importing data back on the catch full screen pro template, I only get an alert saying « Error importing settings! The settings you uploaded are not for the current theme. » So my question is, #1 how come my child theme does not recognize the Pro version #2 What is the best way to upgrade without loosing all the work I have done. Thank you for your attention