A door operator and a method for set-up of the door operator to operate a door leaf of a door set, with the door operator including a control unit, a drive unit, and a user interface, include the steps of receiving a set of set-up parameters for the door operator, installing the set of set-up parameters in the control unit, controlling the drive unit based on the set of set-up parameters installed in the control unit, and sending the set of set-up parameters to a remote server via a communication network for storing a backup of the set of set-up parameters on the remote server.