Right click on the green ring on your taskbar, like the icon on the left in the picture (between 2am and 8am it will be blue, not green) and select "About". If there is no ring, it's either hidden and you have to click on the "show hidden icons" icon, or you have to start the status meter by clicking on the Hughesnet Status Meter icon in your icons on the left (most likely) of your desktop.
But, again, if it was a little over a month ago, and they downloaded it from the Hughesnet site, it's almost assuredly version 6.5.