If the vendor daemon is not starting up, please check the following:

• Check if there is another FlexNet based license server software from one of the following vendors installed: ArcGIS , Leica, Intergraph. This software can cause conflicts, so it is necessary to configure the ports of the eCognition license server
• Check if the local firewall is enabled. Configure the local firewall so it accepts the license server services and ports 
• Check the Windows services and restart the: "FlexNet Licensing Service"