Flush on upgrade

admin/includes/welcome.php

@@ -122,6 +122,10 @@ class WC_Welcome_Page {
 	private function intro() {
 		global $woocommerce;
 
+		// Flush rules after update
+		if ( ! empty( $_GET['wc-updated'] ) )
+			flush_rewrite_rules( false );
+
 		// Drop minor version if 0
 		$major_version = strstr( $woocommerce->version, '0.0' ) ? substr( $woocommerce->version, 0, 3 ) : $woocommerce->version;
 		?>

admin/woocommerce-admin-init.php

@@ -284,9 +284,6 @@ function woocommerce_admin_init() {
 		delete_option( '_wc_install_pages' );
 		delete_option( '_wc_needs_update' );
 
-		// Flush rules after update
-		flush_rewrite_rules( false );
-
 		// What's new redirect
 		wp_safe_redirect( admin_url( 'index.php?page=wc-about&wc-updated=true' ) );
 		exit;