If you are on win 10 try using windows 8 compatibility mode. If you have that on try turning it off. It works for me through standard win 10 and not win 8 but for others it works the other way around.
We tested ithe issue as the game was flagging wireless keyboard/mouse dongles and Fly got it down to stop the Terminal Emu crashing and 1911 error. Dude is ace.