I have already looked to ensure the for the User Interface tab in the Role setup is not hidden. I have looked at everything thing I know. Even as administrator the table is hidden to me unless I go to settings.
If a table is still hidden but showing in all of your User roles I would also suggest checking the table's settings. In the table settings under the Advanced Settings header there is a checkbox that if unchecked removes the table from the table bar.
It is possible it may have gotten unchecked and would now be hidden.