Hi, clicking “reset settings to WP” button in start tab should work. But in case there’s some conflict in htaccess then you’ll need to replace htaccess file with WP default htaccess (https://codex.wordpress.org/htaccess) after each request you make, until you successfully click “reset settings to WP” button in HMWP start tab.
And if you have some programming knowledge then in “wp_options” table in your database, delete the rows with following “option_name”:
– hide_my_wp
– hide_my_wp_undo
– hmwp_ids_installed
– hmw_all_plugins
– external_updates-hide_my_wp