When a new version of KR is released SOMETIMES the version number isn't updated [wasted about 5 minutes realising this on 5.0.4 as it reports 5.0.1. Slap slap devs], I implemented a quick version number check.
Put this where you need it. For me, it's inside a CodeIgniter sub view. It's nice to report version number in the dev / staging environment as a sanity check.
You have to instantiate the class as the version function is non static in KoolReport.php :(
$koolreport = new \koolreport\KoolReport();
echo $koolreport->version();