Connection to the device
Open 2N® LiftIP Service tool and on the toolbar on top choose Device->Connect device.
Now connect to the device, if you don't know IP address, then use FAQ How to get IP address of lift communicator 2N® LiftIP. Fill in IP address of the device, password (default is 2n) and click on connect.
FW upgrade of communicator 2N® LiftIP
Now go to section Device->Upgrade and choose desired version of FW. Then click on Upgrade. Now device will be upgraded.