@Nollog, are you running MB as a service or an application? If MB is running as an application it should not require physically downloading.
However, if you are running MB as a service, you need to either stop the service, physically download and install the update, then restart the service. As an alternative, you can also stop the service, run the MB application which will auto-update MB to the current version, close the application, then restart the service.
I choose the alternative method because I find sometimes as a result of the MB server update there are other plug ins which also need to be updated. The saves a lot or restarts for the service, if I let the application do it's thing and then once all updates are finished I shut down the application and restart the MB Server service.