Sets that all BDE components must be deleted when PostgresDAC ones are created.
If set to True all TTable, TQuery and TStoredProc components will be deleted from project. In other case they will be left on the form or datamodule. However, datasources and fields description will be detached from there and moved to the PostgresDAC replacement.
You may want to left BDE components to manually check correctness of the migration process.