I’ve found a work-round for my hangs. I noticed that, when running multiple clients, only one client (not always the same one though) and the launcher froze, the other clients kept running. So… I tried terminating the launcher as soon as the clients were up and running - done about 20 hours gameplay since, including multiple clients and a 30±system autopiloted (AFK) tour of HS, no hangs or crashes. Not a fix as such, but it will do for now.