When you start the MCS for the first time you will be asked to select a language for the MCS user interface. You only have to make this selection once, but you can change it at any time later using the Select Language menu entry.
By default the MCS will automatically check at startup if there is a new version available and suggest to download and install it. This can be disabled in the application settings
For general usage instructions please see the Quickstart and Main Screen Layout sections.