Open the command centre. Assuming the DAW is online, after it goes through the "checking for updates" stuff when it launches it switches to the main window.
Clicking oion the Sonar icon on the left will open it up to show the compnents installed/not installed/waiting for update to be installed.
Anything green is installed and doesn't have an update waiting for it.
Anything red is either not installed or installed but not using the command centre (e.g. Rapture and DimPro from earlier installations which the controil center doesn't know about).
Anything in yellow has an update available and you get an "update" button in the right hand window. Right click on the Sonar "light" and in the right hand window you will be told the version installed. Mine says "Braintree" then the build number.
If Braintree hasn't been installed the Sonar "light" should be yellow. Braintree is not shown as a seperate download but is the name for the updated Sonar build.
You shouldn't need to go searching for updates etc., the control centre should be handlng that autimatically.