Comment 14 for bug 911732

@ Jori Gel:

Uninstalling the package using either:

sudo apt-get remove citadel-suite
sudo apt-get purge citadel-suite

It leave some config files behind. You will have to use the command:

whereis citadel

To find the left overs, I had couple of config files left in /etc that I had to go and delete manually in order to do a fresh install. Otherwise, as you mention, it will use those config files and bypass the first step in the configuration process that it is to collect pertinent information.