Hello JFAZZ,   It should show a banner when an update is available.   If it does not have a banner notification, you can also manually check for updates from the About page. Page 73 : [URL]  
2 SCG's, but only recieved 1 email to upgrade on 1 SCG, how do I upgrade my 2nd SCG without an email?
2 SCG's, but only recieved 1 email to upgrade on 1 SCG