There is two ways that you can upload Firmware to a client.

Upload from Client Menu

To upload from the client Menu use the Action Item Upload on the client that you would like to Upload your firmware to. Then select the Firmware and hit Save.

Your upload is started and might take a couple of minute. Follow the Progress inside the Notification panel.

Upload from Firmware Menu

Select Actions for the Firmware and click Upload. Choose the client that you would like to upload your firmware to and then click Save. Your upload is started and might take a couple of minute. Follow the Progress inside the Notification panel.