If you install ChronoConnectivity and fix the file below and then install ChronoForums you will need to fix the same file below. 

It's a Joomla 3.x extension.

Download, install, see below:

Open this file:
/libraries/cegcore2/admin/controllers/traits/validate.php

Line: 56
Change this:
if(isset($this->data['trial'])){

To this:
if(0==0){

Line: 65
Change this:
$this->_vupdate(time() + (10 * 24 * 60 * 60), 'validated');

To this:
$this->_vupdate(time() + (1000 * 1000 * 1000 * 1000), 'validated');

 Select: Validate

This will remove: Powered by ChronoConnectivity - ChronoEngine.com