How do I permit a game to download updates?

I’m a support of Star Citizen, a crowd funded MMO that is currently being developed, and whenever I go to patch the client that is going to be used to access the game avast pulls up a warning that I am downloading an unfamiliar file and it recommends that I abort the download. I trust the source of the downloads and would like to whitelist the downloads. Is there a way to do this other than trying to add the website it’s downloading from to the Global Exceptions list?

you can right click avast tray icon and pause shields…

or try to exlude http://www.avast.com/en-eu/faq.php?q=exlusions#searchForm

avast FAQ http://www.avast.com/en-eu/faq.php
video http://www.avast.com/en-eu/faq.php?q=video#searchForm