To rename selected table, choose Table | Utilities | Rename.... For local tables (i.e. Paradox or dBase), related files (index files etc.) are also renamed. Note: this way, you cannot change the table format (e.g. from Paradox to dBase), you should use data exporting for this.
The alternative way to rename a table in SQL-based databases is using a SQL query according to your database documentation. For example, to rename a PostgreSQL table, execute the following database query:
ALTER TABLE <old_table_name> RENAME TO <new_table_name>