JezK

Edit File: gosmtp.php

<?php
/*
Plugin Name: GoSMTP
Plugin URI: https://gosmtp.net
Description: Send emails from your WordPress site using your preferred SMTP provider like Gmail, Outlook, AWS, Zoho, SMTP.com, Sendinblue, Mailgun, Postmark, Sendgrid, Sparkpost, Sendlayer or any custom SMTP provider.
Version: 1.1.1
Author: Softaculous Team
Author URI: https://softaculous.com
Text Domain: gosmtp
*/

/*
* GoSMTP
* https://gosmtp.net
* (c) GoSMTP Team
*/

/*
GoSMTP's Mailer API connecters are derived from Fluent SMTP:
https://wordpress.org/plugins/fluent-smtp/
(C) FluentSMTP & WPManageNinja Team

FluentSMTP is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.	
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
*/

// We need the ABSPATH
if (!defined('ABSPATH')) exit;

if(!function_exists('add_action')){
	echo 'You are not allowed to access this page directly.';
	exit;
}

$gosmtp_tmp_plugins = get_option('active_plugins', []);

if(!defined('SITEPAD') && in_array('gosmtp-pro/gosmtp-pro.php', $gosmtp_tmp_plugins)){

// Was introduced in 1.0.7
	$gosmtp_pro_info = get_option('gosmtp_pro_version');
	
	if(!empty($gosmtp_pro_info) && version_compare($gosmtp_pro_info, '1.0.7', '>=')){
		// Let GoSMTP load
	
	// Lets check for older versions
	}else{

if(!function_exists('get_plugin_data')){
			include_once ABSPATH . 'wp-admin/includes/plugin.php';
		}

$gosmtp_pro_info = get_plugin_data(WP_PLUGIN_DIR . '/gosmtp-pro/gosmtp-pro.php');
		
		if(!empty($gosmtp_pro_info) && version_compare($gosmtp_pro_info['Version'], '1.0.7', '<')){
			return;
		}
	}
}

// If GOSMTP_VERSION exists then the plugin is loaded already !
if(defined('GOSMTP_VERSION')) {
	return;
}

define('GOSMTP_FILE', __FILE__);

include_once(dirname(__FILE__).'/init.php');