update

wp-content/plugins/header-footer-code-manager/uninstall.php

@@ -0,0 +1,14 @@
+<?php
+// If uninstall is not called from WordPress, exit
+if (! defined('WP_UNINSTALL_PLUGIN') ) {
+    exit;
+}
+
+$option_name = 'hfcm_db_version';
+delete_option($option_name);
+
+// Drop a custom db table
+global $wpdb;
+$table_name = $wpdb->prefix . 'hfcm_scripts';
+
+$wpdb->query("DROP TABLE IF EXISTS $table_name");