NSX Container Plugin Operator is responsible for managing the life cycle of NCP.

To upgrade NCP, in operator.yaml, modify the NCP_IMAGE variable. Also update the image parameter for nsx-ncp-operator. For example, for NCP 3.1.1, the operator image is vmware/nsx-container-plugin-operator:v3.1.1. Then run the following command:
oc edit deploy nsx-ncp-operator -n nsx-system-operator