As long as you are using Centos 7 you can upgrade from Kloxo-MR to KloxoNG.
The process cannot be reversed and make sure you’ve made a backup (or taken a snapshot) of your VM (or instance) so you can restore to your previous version if there is a problem.
Note: Kloxo-MR’s backup tools are broken so don’t trust it to make a copy of your install – you must back up the entire VM not just Kloxo.
Use the installation instructions at https://github.com/KloxoNGCommunity/kloxong/blob/master/how-to-install.txt
Or just follow these commands
yum update -y
rm -f kloxong*
rpm -ivh https://github.com/KloxoNGCommunity/kloxong/raw/initial-rpm/kloxong-release.rpm
yum clean all
yum update kloxong-* -y
yum install kloxong -y