On one of my research machines I upgraded to OpenERP v7, did some research, then "apt-get remove openerp --purge", and "dpkg -i openerp_6.1-latest-1_all.deb".
Now I'm running version 6.1 but it thinks every module is installed. And I can't set Administrator to see Update Modules.
Do you have any ideas about how to downgrade from v7 and get a functional system?