diff --git a/changelog.txt b/changelog.txt
index 502198405..466871caf 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -5,7 +5,9 @@
 * NEW - added filter `wp_stateless_get_file_sizes`, retrieves the GCS file data for image sizes, should be used instead of getting `sm_cloud` postmeta directly.
 * NEW - added filter `wp_stateless_get_file_meta`, retrieves all GCS file meta data, should be used instead of getting `sm_cloud` postmeta directly.
 * NEW - added filter `wp_stateless_get_file_meta_value`, retrieves the GCS file meta data by meta_key, should be used instead of getting `sm_cloud` postmeta directly.
-* NEW - added setting allowing to change email for WP-Stateless notifications.
+* NEW - added filter `wp_stateless_get_setting_...` which allows to override any WP-Stateless setting. 
+* NEW - added setting "Send Status Emails" allowing to change email for WP-Stateless notifications.
+* NEW - added setting "Use Post Meta" allowing to switch back to using `postmeta` instead of custom DB tables. Can be used in case of issues after upgrading to 4.0.0.
 * NEW - added new Settings tab `Addons`, which contains the list of WP-Stateless Addons, which replace Compatibilities.
 * NEW - added new Settings tab `Status`, which contains status and health information related to Google Cloud Storage and WP-Stateless.
 * NEW - CLI command `wp stateless migrate` to list and operate data optimizations.
diff --git a/changes.md b/changes.md
index 9160496e5..34919436c 100644
--- a/changes.md
+++ b/changes.md
@@ -4,7 +4,9 @@
 * NEW - added filter `wp_stateless_get_file_sizes`, retrieves the GCS file data for image sizes, should be used instead of getting `sm_cloud` postmeta directly.
 * NEW - added filter `wp_stateless_get_file_meta`, retrieves all GCS file meta data, should be used instead of getting `sm_cloud` postmeta directly.
 * NEW - added filter `wp_stateless_get_file_meta_value`, retrieves the GCS file meta data by meta_key, should be used instead of getting `sm_cloud` postmeta directly.
-* NEW - added setting allowing to change email for WP-Stateless notifications.
+* NEW - added filter `wp_stateless_get_setting_...` which allows to override any WP-Stateless setting. 
+* NEW - added setting "Send Status Emails" allowing to change email for WP-Stateless notifications.
+* NEW - added setting "Use Post Meta" allowing to switch back to using `postmeta` instead of custom DB tables. Can be used in case of issues after upgrading to 4.0.0.
 * NEW - added new Settings tab `Addons`, which contains the list of WP-Stateless Addons, which replace Compatibilities.
 * NEW - added new Settings tab `Status`, which contains status and health information related to Google Cloud Storage and WP-Stateless.
 * NEW - CLI command `wp stateless migrate` to list and operate data optimizations.
diff --git a/lib/classes/class-bootstrap.php b/lib/classes/class-bootstrap.php
index 262e1b715..41d4594cb 100644
--- a/lib/classes/class-bootstrap.php
+++ b/lib/classes/class-bootstrap.php
@@ -64,6 +64,8 @@ protected function __construct($args) {
 
         parent::__construct($args);
 
+        self::$version = $args['version'] ?? self::$version;
+
         /**
          * Add custom args to api ping request
          */
@@ -1874,7 +1876,7 @@ public function attachment_url_to_postid($post_id, $url) {
             // User can use this constant if they change the Bucket Folder (root_dir) after uploading image.
             // This can be little slow at first run.
             if (empty($post_id)) {
-              if ( !defined('WP_STATELESS_POSTMETA') || !WP_STATELESS_POSTMETA ) {
+              if ( !$this->get('sm.use_postmeta') ) {
                 $query = 'SELECT post_id FROM ' . ud_stateless_db()->files . ' WHERE file_link = %s';
                 $post_id = $wpdb->get_var($wpdb->prepare($query, $url));
               }
diff --git a/lib/classes/class-db.php b/lib/classes/class-db.php
index d4dfa7746..7f7b84208 100644
--- a/lib/classes/class-db.php
+++ b/lib/classes/class-db.php
@@ -705,7 +705,7 @@ public function get_total_files() {
        * @return array
        */
       public function get_file($meta, $attachment_id, $with_sizes = false) {
-        if ( defined('WP_STATELESS_POSTMETA') && WP_STATELESS_POSTMETA ) {
+        if ( ud_get_stateless_media()->get('sm.use_postmeta') ) {
           $meta = get_post_meta($attachment_id, 'sm_cloud', true);
 
           if ( !empty($meta) ) {
@@ -751,7 +751,7 @@ public function get_file($meta, $attachment_id, $with_sizes = false) {
        * @return array
        */
       public function get_file_sizes($sizes, $attachment_id) {
-        if ( defined('WP_STATELESS_POSTMETA') && WP_STATELESS_POSTMETA ) {
+        if ( ud_get_stateless_media()->get('sm.use_postmeta') ) {
           $meta = get_post_meta($attachment_id, 'sm_cloud', true);
           return isset($meta['sizes']) ? $meta['sizes'] : [];
         }
@@ -796,7 +796,7 @@ public function get_file_sizes($sizes, $attachment_id) {
        * @return mixed
        */
       public function get_file_meta_value($value, $post_id, $key, $default = null) {
-        if ( defined('WP_STATELESS_POSTMETA') && WP_STATELESS_POSTMETA ) {
+        if ( ud_get_stateless_media()->get('sm.use_postmeta') ) {
           $meta = get_post_meta($post_id, 'sm_cloud', []);
 
           return isset($meta[$key]) ? $meta[$key] : $default;
diff --git a/lib/classes/class-settings.php b/lib/classes/class-settings.php
index cd11a4ab5..0b71d1579 100644
--- a/lib/classes/class-settings.php
+++ b/lib/classes/class-settings.php
@@ -48,6 +48,7 @@ final class Settings extends \UDX\Settings {
         'dynamic_image_support'  => array(['WP_STATELESS_MEDIA_ON_FLY' => 'WP_STATELESS_DYNAMIC_IMAGE_SUPPORT'], 'false'),
         'status_email_type'      => array('', 'true'),
         'status_email_address'   => array('', ''),
+        'use_postmeta'           => array('WP_STATELESS_POSTMETA', ['false', '']),
       );
 
       private $network_only_settings = array(
@@ -626,6 +627,28 @@ public function processing_tab_content() {
 
         include ud_get_stateless_media()->path('static/views/processing_interface.php', 'dir');
       }
+
+      /**
+       * Getter for settings
+       *
+       * @param string|bool $key
+       * @param mixed $default
+       * @return mixed
+       */
+      public function get( $key = false, $default = false ) {
+        $value = parent::get( $key, $default );
+
+        if ( $key === 'sm' && is_array($value) ) {
+          foreach ( $value as $key => $val ) {
+            $value[$key] = apply_filters("wp_stateless_get_setting_$key", $val, $default);
+          }
+        } else if ( is_string($key) ) {
+          $key = str_replace('sm.', '', $key);
+          $value = apply_filters("wp_stateless_get_setting_$key", $value, $default);
+        }
+
+        return $value;
+      }
     }
 
   }
diff --git a/lib/classes/class-utility.php b/lib/classes/class-utility.php
index c95089bc6..22388b785 100644
--- a/lib/classes/class-utility.php
+++ b/lib/classes/class-utility.php
@@ -920,8 +920,11 @@ public static function convert_to_byte($size) {
       public static function get_stateless_media_data_count() {
         global $wpdb;
 
-        if ( !defined('WP_STATELESS_POSTMETA') || !WP_STATELESS_POSTMETA ) {
-          return ud_stateless_db()->get_total_files();
+        if ( !ud_get_stateless_media()->get('sm.use_postmeta') ) {
+          try {
+            return ud_stateless_db()->get_total_files();
+          } catch (\Throwable $th) {
+          }
         }
 
         $stateless_media = $wpdb->get_var($wpdb->prepare("
diff --git a/readme.txt b/readme.txt
index 1ff3c24f5..4da2b6038 100644
--- a/readme.txt
+++ b/readme.txt
@@ -5,8 +5,8 @@ Tags: google cloud, google cloud storage, cdn, uploads, backup
 License: GPLv2 or later
 Requires PHP: 8.0
 Requires at least: 5.0
-Tested up to: 6.4.3
-Stable tag: 4.0.0-RC.1
+Tested up to: 6.5.0
+Stable tag: 4.0.0-RC.2
 
 Upload and serve your WordPress media files from Google Cloud Storage.
 
@@ -127,7 +127,9 @@ Before upgrading to WP-Stateless 3.0, please, make sure you tested it on your de
 * NEW - added filter `wp_stateless_get_file_sizes`, retrieves the GCS file data for image sizes, should be used instead of getting `sm_cloud` postmeta directly.
 * NEW - added filter `wp_stateless_get_file_meta`, retrieves all GCS file meta data, should be used instead of getting `sm_cloud` postmeta directly.
 * NEW - added filter `wp_stateless_get_file_meta_value`, retrieves the GCS file meta data by meta_key, should be used instead of getting `sm_cloud` postmeta directly.
-* NEW - added setting allowing to change email for WP-Stateless notifications.
+* NEW - added filter `wp_stateless_get_setting_...` which allows to override any WP-Stateless setting. 
+* NEW - added setting "Send Status Emails" allowing to change email for WP-Stateless notifications.
+* NEW - added setting "Use Post Meta" allowing to switch back to using `postmeta` instead of custom DB tables. Can be used in case of issues after upgrading to 4.0.0.
 * NEW - added new Settings tab `Addons`, which contains the list of WP-Stateless Addons, which replace Compatibilities.
 * NEW - added new Settings tab `Status`, which contains status and health information related to Google Cloud Storage and WP-Stateless.
 * NEW - CLI command `wp stateless migrate` to list and operate data optimizations.
diff --git a/static/migrations/20240219175240.php b/static/migrations/20240219175240.php
index fb5270a2d..f08bc5107 100644
--- a/static/migrations/20240219175240.php
+++ b/static/migrations/20240219175240.php
@@ -328,9 +328,9 @@ public function process_item($item) {
 
       // Update file meta data ('fileMd5' for LiteSpeed Cache)
       $key = 'fileMd5';
-      $md5_data = $meta[$key] ?? [];
+      $md5_data = $meta[$key] ?? null;
 
-      if ( !empty($meta) ) {
+      if ( !empty($md5_data) ) {
         $data = [
           'post_id'               => $item,
           'meta_key'              => sanitize_key($key),
diff --git a/static/views/settings-sections/file-url.php b/static/views/settings-sections/file-url.php
index afcb6743c..6c1b88dd9 100644
--- a/static/views/settings-sections/file-url.php
+++ b/static/views/settings-sections/file-url.php
@@ -114,6 +114,23 @@
 
         <?php _e('Upload image thumbnails generated by your theme and plugins that do not register media objects with the media library. This can lead to significant negative performance impact.', ud_get_stateless_media()->domain); ?>
       </p>
+
+      <h4><?php _e('Use Post Meta', ud_get_stateless_media()->domain); ?></h4>
+
+      <p>
+        <select id="use_postmeta" name="sm[use_postmeta]">
+          <?php if (is_network_admin()) : ?>
+            <option value="" <?php selected( $sm->use_postmeta, '' ); ?>><?php _e('Don\'t override', ud_get_stateless_media()->domain); ?></option>
+          <?php endif; ?>
+          <option value="true" <?php selected( $sm->use_postmeta, 'true' ); ?>><?php _e('Enable', ud_get_stateless_media()->domain); ?></option>
+          <option value="false" <?php selected( $sm->use_postmeta, 'false' ); ?>><?php _e('Disable', ud_get_stateless_media()->domain); ?></option>
+        </select>
+      </p>
+
+      <p class="description">
+        <strong id="notice-use_postmeta"></strong>
+        <?php _e('Use post meta instead of custom WP-Stateless DB tables. Enable <strong>only</strong> if you experience technical issues after upgrading to WP-Stateless 4.0.0', ud_get_stateless_media()->domain); ?>
+      </p>
     </fieldset>
   </td>
 </tr>
diff --git a/wp-stateless-media.php b/wp-stateless-media.php
index d389290db..a59a1ab8e 100644
--- a/wp-stateless-media.php
+++ b/wp-stateless-media.php
@@ -4,7 +4,7 @@
  * Plugin URI: https://stateless.udx.io/
  * Description: Upload and serve your WordPress media files from Google Cloud Storage.
  * Author: UDX
- * Version: 4.0.0-RC.1
+ * Version: 4.0.0-RC.2
  * Text Domain: stateless-media
  * Author URI: https://udx.io
  * License: GPLv2 or later