Error on WooCommerce deactivation

Hi,
sorry, again the error I already reported …

The moment I deactivate WooCommerce, I get this error:
Fatal error: Uncaught Error: Call to undefined function WC() in ...\wp-content\plugins\wc-fields-factory\includes\wcff-product-fields.php:82

You should add a method to check if WooCommerce is activated, in the beginning of method registerHooks() you might add WC activation check, something like this:

public function registerHooks() {
	if( ! class_exists( 'WC' ) ) {
		add_action( 'admin_notices', array( $this ,'admin_notice') ); 
	}else{
		... the rest of method
	}
	
}
public function admin_notice() {
	$class = "error updated settings-error notice is-dismissible";
	$message = __( 'WooCommerce is deactivated or even not installed. WC Fields Factory is useless without WooCommerce - please re-activate WooCommerce or deactivate WC Fields Factory', 'wcff' );
	echo "<div class=\"$class\"><p>$message</p></div>";
}

Please could you fix that asap … ?
Big thanks (and sorry for spam).
Regards