If you have already executed the above prerequisites, then refer to the guide for applying a license in the UI: Actions: License Update
Upgrading a license
A license upgrade is required when moving from one license type to another (Trial -> Enterprise and vice-versa). Trilio maintains only one instance of a license for every installation of Trilio for Kubernetes.
To upgrade a license, run kubectl apply -f <licensefile> -n <install-namespace> against a new license file to activate it. The previous license will be replaced automatically.