Upgrading or downgrading software - files already on hard drive
All versions of software loaded on a console are available at any time on the hard drive.
Ensure you have saved your current show file to a USB memory stick or to an external computer via network before you change software version. Also, ensure any personalities that you have customised have been saved to a different file name of your choice - the new software will install the latest version of the standard personalities. We recommend you only upgrade to new versions of software when you have plenty of time to recover the system - we don’t recommend you change it two minutes before doors!
To load a different version of the software:
Navigate to the software upgrade utility - Setup, View System, View Status, Softkey = Change Software
Follow the onscreen directions and select the software version you require.
For more on this topic see:
https://secure.chamsys.co.uk/help/documentation/magicq/ch43.html