Hi Jeff,
Here are some old articles on accessing Citadel 4 data from MSQuery and MSAccess. These should at least give you a starting point:
http://zone.ni.com/devzone/conceptd.nsf/webmain/85CECF0AEEC5B1B28625680800733CC6
http://zone.ni.com/devzone/conceptd.nsf/webmain/0A3D4EEAC9208065862568080072DB9F
Also, do you have NI-MAX? You can check for data in there too.
Hope this helps,
Khalid