Elawaria: You can download ryzom from its homepage. I don't know that launchpad package, but if it's like the official downloadable package, you can - inside a terminal window - simply "cd" into the location (e.g. "cd /opt/ryzom") and then run ryzom's update script ("./ryzom_update.sh"). It uses an rsync command to sync over the latest changes - only the differences are transferred, so the update process is very efficient.
