I would like to change the Match Codes and have all the old results go away.

Thanks

In order to do this you will need access to SQL.  Just open a query window and paste the following statements:

USE c360_Solutions;
TRUNCATE TABLE DupDet_Matchcode;
TRUNCATE TABLE DupDet_PDQGeneration;

This will remove the content of both tables that Duplicate Detection uses.  Next you will need to run Match Code Generation to populate these tables with data generated by the new match codes.

-Henry