a known-good program
Why do you think so..??
It's pretty well known and I've yet to see any complaints from anyone, nor have I had any issues myself...and I'm pretty security-conscious. In fact, most of those web-scanners out there are known to give a lot of false positives on sites with unpopular programs or URL's. I can give a perfect example where a video game multiplayer modification I work on in another community keeps getting falsely flagged by Google's Webmaster Tools scanner, and they have absolutely no way to request an exception to be made. Ironically, Avast! flagged the same program for 3 years until it was finally fixed.
I'm sorry to say, but suspicious domain and file names that clearly aren't meant to be are pretty obviously not an issue. I do agree that being careful is a great idea, but this should be researched further before flagging it as malicious. Why not have Avast! warn users that the URL is suspicious, not malicious? It doesn't have a way to add exceptions for scanning in the Network Shield itself.