I downloaded it last night and did not get a malware warning like I did before, so I think he fixed it.
I don't know if you fixed something or if Avast sorted itself out, but I was able to download with no issues last night. Thanks!
Avast tells me the specific file throwing the flag is Windows\game.jarlcom\zarkonnen\airships\AGame.class. Hope that helps!
I got the same thing using Avast.