Is there anyway to reset the community address book?

I changed the ldap filter to only have users in a test group for
conferencing. but prior to that on my client, I did a Fetch contacts,
and it grabbed alot of users that aren't part of our test group.
Nothing I've done so far as removed that list from my system.

uninstalling client
uninstalling client and removing the meeting folder in documents and
settings/.../application data
restarting the server
turned off retrieve community address book in client, turned it back on

do I need to get into the database to fix it? I'm not familiar with
postgres, somewhat familiar with mysql.