To upgrade your installed version you can either reinstall CacheGuard-OS NG or apply a patch. Please note that there isn't a patch for all versions as some evolutions require an installation from scratch. Before reinstalling CacheGuard OS think of saving your configuration in order to reload it into to your freshly installed version. Here you can find available patches.
To apply a patch you can either use the system
online command or use the menu option [GENERAL] > [System Operations] > [OS Patching]
in the Web GUI. If using online commands think of using the apply
command after having loaded a patch. If using the Web GUI think of applying changes (click on the blinking down arrow button and then submit changes).
You can consult the change logs HERE
CacheGuard is an OS/Appliance dedicated to Web traffic Security and Optimization. See www.cacheguard.com for further information.