If you’re curious how long it’s been since the last reboot of your Untangle server, simply log in to the web administration gui and hover your mouse over the CPU Load box at the top of the rack. It will have a small pop up box giving you the current system uptime, as well as some additional system info.
For as easy as this process really is, I don’t know why it’s not easy to find these steps. So I’m listing it here for my future reference and to hopefully help others looking for this process.
Simply download the the updated definitions here: http://data.mbamupdates.com/tools/mbam-rules.exe
Then copy the file over to the system you want to update and run it. Walla!