[Support request] Different Sidebar layout on each category

I have two categories and I want to have a different sidebar layout for each.

I found the code to do this but it doesn’t do anything:

add_filter( 'generate_sidebar_layout', function( $layout ) {
    // If we are on a category, set the sidebar
    if ( is_category() ) {
        return 'no-sidebar';
    }

    // Or else, set the regular layout
    return $layout;
 } );

I do have GP premium but not on the website that I need this change on. So I tried the code above on a free GP theme.

Does the code above work with GP premium only?
How can I update my current free theme to premium without losing my settings and modified files?