WooCommerce API Manager 3.4.1

* Fix: Adjusts the WooCommerce Helper integration logic to ensure the plugin shows correctly on the license activation screen.

* Fix: Warning wc-am-settings-admin.php and wc-am-settings-admin.php failed to open. The directory path was not updated properly on the last release.

* Fix: Fixed "auth_key will be truncated by openssl_encrypt() since it is 64 bytes" warning.
* Fix: Fixed due to missing trailing slash at the end of directory name in autoload class, "Fatal error: Class 'WC_AM_Tools' not found in \wp-content\plugins\woocommerce-api-manager\includes\wc-am-core-functions.php on line 77."
* Tweak: Made some admin notices dismissible. Use new admin_notice CSS classes.