Hi Joe,
currently the only way to get a full refresh is to restart the connector.
The disadvantage of that is that all Alerts get cleared and come in fresh, e.g. possibly triggering Escalations actions again.
It is a long desired feature to be able (for example from the Admin menu) to instruct a running connector to "refresh" the information. That is on the list of improvements, but without any date for delivery.
MichaelBoehm