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My DataHub configuration has changed since the last time I closed it. What caused this change?

The cause of this configuration change can be that the DataHub demo has timed out.

When the demo times out, DDE, OPC and TCP interfaces are turned off.

PROBLEM:  If you subsequently press Apply or OK in the properties dialog, or if you exit DataHub with the tray menu "Exit" entry, the configuration will get written with those interfaces turned off. On the next restart those interfaces will remain turned off.

SOLUTION:  When the demo period expires a dialog will appear. If you click the OK button on this dialog your configuration will not be effected.