Howto fetch counter on new post?

This was giving problem and making slow (for those who use many counters) and so I ended up removing.

But you can do with this:

function custom_social_count_plus_load() {
	if ( ! class_exists( 'Social_Count_Plus_Generator' ) ) {
		return;
	}

	function custom_social_count_plus_clean_cache() {
		Social_Count_Plus_Generator::reset_count();
	}

	add_action( 'save_post', 'custom_social_count_plus_clean_cache' );
}

add_action( 'plugins_loaded', 'custom_social_count_plus_load', 0 );

Into which file i should add this function, or which file contains the manual modification (social_count_plus_transient_time)?

You can create a plugin to do this or the functions.php of your theme.