As you can see, despite the nature of the software being protection against zero-day risks, Threatfire requires updates from time to time. These are usually automated, but can also be instigated via the Smart Update button.
However, Threatfire updates sometimes fail to work. This is a known problem, and while largely extinguished, if you are running an older version of the utility you might still experience it.
Luckily there is an easy resolution: simply change your Windows system clock to reflect a different US-based timezone and then run the update again. Once done, reset your Windows time and the problem should be fixed!