[xwiki-users] migrating from .war to Debain apt package

Hi, I'm struggling with migrating a 6.3 .war instance to a Debian APT/package 7.3 instance. I had hoped I would be able to install as per http://platform.xwiki.org/xwiki/bin/view/AdminGuide/InstallationViaAPT choosing the xwiki-enterprise-tomcat7-mysql package, then edit hibernate.cfg.xml to point at the existing (external) MySQL instance hosting the database, then edit server.xml, xwiki.cfg and xwiki.properties to match the previous. The new instance connects, and after editing xwiki.cfg, I can login as superadmin, the previously setup LDAP auth not working), I was expecting to see the xwiki updater run, but it did not, and the top bar of xwiki is empty, it only has the logo on the far left and the three little lines on teh far right under which the only option is logout. Do I need to to do a .war update to get it up to 7.3 before migrating to a Debian APT/package instance ? or is there something that I have missed ? Cheers