If you want to deploy KNIME in a productive environment KNIME Professional provides support on all KNIME features and priority bug fixes through a commercial agreement. KNIME Professional is available for both - KNIME Desktop and KNIME Report Designer - as a one year subscription. Please note that there is no functional difference between the open source version.
KNIME Professional is included in KNIME Team Space and KNIME Server.
info [at] knime [dot] com (Contact us) to obtain more details about the KNIME product suite.