please check first both attached documents which describe the process and actions to be taken. Such documents are available on our Web Portal where you should have already access to.
ST-157 shows how to do it ( generating a CF card with an XT3 updater )
ST-160 is an update as the software version changed in the meantime.
Please log a claim in service now to our competence center and require the firmware accordingly. I think Souer has already flash cards available on stock.