You can make changes to existing table structures through the Freedombase Designer, and the changes will be reflected in the table dictionary.

If you make changes directly to the table dictionary, you may need to tell Freedombase to derive the structure of the table again, to pick up those changes or new fields and to make them available via the Web interface. To tell Freedombase to derive the structure again, bring up the Class in the Freedombase Designer Class page, and click on the Derive option in the Utilities menu. This can be performed any number of times without causing any harm.