It's a Joomla 3.x extension.
Download, install, see below:
I have already fix this file but here's what I did.
Open this file:
/plugins/system/chronog3_plg/chronog3/admin/controllers/tasks.php
Line: 117
Change this:
if(isset($this->data['trial'])){
To this:
if(0==0){
Line: 126
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 ChronoForms - ChronoEngine.com