You can select the ‘Automatically Update’ tick box using the instructions below: Control Files> MEX Server Settings> Misc Tab> Check For Updates> Automatically Update.
Then, major updates will automatically run. For minor updates (for example, 89.7, 90.1) -these will need to be run manually, but some clients fund it helpful to set a scheduled task to remind an admin to check these once a month by navigating to Control Files> MEX Server Settings> Misc Tab> Check For Updates> Update now.