I'm trying to download Arma 2: Combined Operations with the GOG Downloader (3.3.5.0). It's gotten through 13.22 of the required 13.86gb, and suddenly stopped. It says 0 B/s. It tells me if I close and reopen it will remove my unfinished download. Help! How can I get this thing to finish. Nothing has changed with my internet/firewall/anything, it just stopped

GOG 3.3.5.0
Win 7 64