Hi, while renaming wp-admin path name, you should follow the onscreen instructions properly or else you could be locked out of admin access.
Please follow these steps to reset the plugin:
1) In “wp_options” table in your database, delete the rows with following “option_name”. Please backup your database first.
2) comment out or remove following line from wp-config.php (if you have added there previously)
After this you can re-apply the settings in HMWP.
Let us know if any issue.