To install or upgrade cse simply do the following from the root shell via SSH:

cd /usr/src
rm -fv /usr/src/cse.tgz
wget https://de.webdade.com/ConfigServer/cse/cse.tgz
tar -xzf cse.tgz
cd cse
sh install.sh
rm -Rfv /usr/src/cse*

Then login to WHM and scroll to the bottom of the left hand menu and you should see "ConfigServer Explorer"

If you want to uninstall, simply:

cd /usr/src
rm -fv /usr/src/cse.tgz
wget https://de.webdade.com/ConfigServer/cse/cse.tgz
tar -xzf cse.tgz
cd cse
sh uninstall.sh
rm -Rfv /usr/src/cse*