!!! IMPORTANT 2.0 version before upgrade please run full backup of your site !!!

- new code structure, optimized for next development;
  - created spl_autoloader for remove includes;
  - UM classes with namespaces;
  - deprecated global $ultimatemember; variable (use UM() instead);
- new UM/WP roles logic;
- new settings class and logic (deprecated Redux framework, deprecated some old options, added some new options);
- new dependencies class for extensions;
- WP native styles for backend fields;
- new upgrades and license activations for extensions;
- new logic form backend forms and fields;
- created uninstall.php file for delete permanently all UM settings;
- optimized registration/upgrade profile process;

Deprecated Hooks:

um_new_user_registration_plain
um_user_registration_extra_hook
um_add_user_frontend
um_post_registration_global_hook
um_admin_extend_directory_options_general (was action...will be filter)

includes/core/class-ajax-common.php

@@ -0,0 +1,64 @@
+<?php
+namespace um\core;
+
+// Exit if executed directly
+if ( ! defined( 'ABSPATH' ) ) exit;
+
+if ( ! class_exists( 'AJAX_Common' ) ) {
+    class AJAX_Common {
+
+        /**
+         * AJAX_Common constructor.
+         */
+        function __construct() {
+            // UM_EVENT => nopriv
+            $ajax_actions = array(
+                'router'   => false
+            );
+
+            foreach ( $ajax_actions as $action => $nopriv ) {
+
+                add_action( 'wp_ajax_um_' . $action, array( $this, $action ) );
+
+                if ( $nopriv )
+                    add_action( 'wp_ajax_nopriv_um_' . $action, array( $this, $action ) );
+
+            }
+
+
+            /**
+             * Fallback for ajax urls
+             * @uses action hooks: wp_head, admin_head
+             */
+            add_action( 'wp_head', array( $this, 'ultimatemember_ajax_urls' ) );
+            add_action( 'admin_head', array( $this, 'ultimatemember_ajax_urls' ) );
+
+        }
+
+
+        function ultimatemember_ajax_urls() {
+            $enable_ajax_urls = apply_filters( "um_enable_ajax_urls", true );
+
+            if ( $enable_ajax_urls ) { ?>
+
+                <script type="text/javascript">
+
+                    var ultimatemember_image_upload_url = '<?php echo um_url . 'includes/lib/upload/um-image-upload.php'; ?>';
+                    var ultimatemember_file_upload_url = '<?php echo um_url . 'includes/lib/upload/um-file-upload.php'; ?>';
+                    var ultimatemember_ajax_url = '<?php echo admin_url('admin-ajax.php'); ?>';
+
+                </script>
+
+            <?php }
+        }
+
+
+        /**
+         * Router method
+         */
+        function router() {
+            $router = new Router();
+            $router->backend_requests();
+        }
+    }
+}