Hi Nikolaas,
Amazon documentation states that Redshfit cluster should be connected to either through JDBC or ODCB driver: https://docs.aws.amazon.com/redshift/latest/mgmt/query-databases.html
So in case of EasyMorph, you should install ODBC driver, configure ODBC DSN to your Redshift cluster and create EasyMorph ODBC connector with Redshift SQL dialect selected.
As a workaround, you can try to use the native PostgreSQL connector to connect to your Redshift cluster. But some EasyMorph database-related actions may not work as expected or not work at all which such connection.
Does ODBC connector will work for you? If no - can you please tell us why do you specifically need a native connector?