[FC pro plugin] Updated to PHP 7.4.27 causes errors

Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; plgSystemFlexisyspro has a deprecated constructor in /home/customer/www/ogbr.org/public_html/plugins/system/flexisyspro/flexisyspro.php on line 33 

class plgSystemFlexisyspro extends JPlugin
{
/**
* Constructor
*/
function plgSystemFlexisyspro( &$subject, $config )
{
parent::__construct( $subject, $config );
$extension_name = 'com_flexicontent';
//JPlugin::loadLanguage($extension_name, JPATH_SITE);
JFactory::getLanguage()->load($extension_name, JPATH_SITE, 'en-GB'  , true);
JFactory::getLanguage()->load($extension_name, JPATH_SITE, null     , true);
}

Deprecated: implode(): Passing glue string after array is deprecated. Swap the parameters in /home/customer/www/ogbr.org/public_html/plugins/system/flexisyspro/flexisyspro.php on line 310

$html .= is_array($str) ? implode($str, "") : $str;

hello flexipro is a paid plugin contact georgios for update

Hello

The Pro plugin has been updated for php 7.4.x and PHP 8.0.x
It will be available for purchase next week

If you want to get it now you can contact me with Private Message
Also FC v4.0.0 is now available for both J3 / J4

Hi
how did we get the 4.0.0 version ?

is here www.flexicontent.org/downloads/latest-version.html