The game is crashing every time in 1915 for me too (Grand Campaign). I couldn't work out how to get it in a zip file but I copied the log to Word and have pasted it below. I hope that it is useful. There is something about "bad animation" at the bottom of the report.
Log date: 2013-12-28 10:17:35
[10:17:35][1f24]Commander: The Great War(v 1.4.0)
[10:17:35][1f24]Loading main script
[10:17:35][1f24]Loading app script
[10:17:35][1f24]Script init
[10:17:35][1f24]App version:1.4.0
[10:17:35][1f24]Today is: 28.12.2013
[10:17:36][1630]Starting track: data/music/main_menu.ogg
[10:17:50][2204]Map loaded in 0.046sec
[10:17:50][2204]Invalid railroad from: KRISTIANA
[10:17:50][1f24]Maximum texture size: 8192
[10:17:55][1f24]Scene initialized in: 5.283 seconds
[10:17:55][1f24] Memory usage: 195640 bytes
[10:17:55][1f24] Memory allocation time: 0.002 sec
[10:17:55][1f24] Memory deallocation time: 0.002 sec
[10:17:57][1630]Starting track: data/music/game4.ogg
[10:17:57][1f24]Hud initialized in:1.824 seconds
[10:18:00][1f24]Lua mem usage 1: 6694
[10:18:00][1f24]Lua mem usage 2: 5819
[10:18:00][1f24]AiMakeTurn() for neutral
[10:18:00][1f24]*** Starting naval AI ***
[10:18:00][1f24]*** Starting naval AI phase 2 ***
[10:18:00][1f24]Lua mem usage 1: 3685
[10:18:00][1f24]Lua mem usage 2: 3665
[10:18:00][1f24]Phase start: entente
[10:18:00][1f24]AiMakeTurn() for entente
[10:18:00][1f24]*** Starting naval AI ***
[10:18:02][1f24]Invalid frame size for animation: arrows/move2/move_22fi
[10:18:03][1f24]Unit #1302 killed
[10:18:03][1f24]Removing gfx for unit #1302
[10:18:39][1f24]Unit #1224 killed
[10:18:39][1f24]Removing gfx for unit #1224
[10:18:55][1f24]Scripted effect on invalid hex
[10:18:55][1f24]Scripted effect on invalid hex
[10:20:28][1f24]*** Starting naval AI phase 2 ***
[10:20:29][1f24]Lua mem usage 1: 26514
[10:20:29][1f24]Lua mem usage 2: 24792
[10:20:29][1f24]Staring game turn 38
[10:20:29][1f24]Phase start: central_powers
[10:21:01][1630]Vorbis stream finished
[10:21:02][1630]Starting track: data/music/game1.ogg
[10:21:10][1f24]Unit #1290 killed
[10:21:10][1f24]Removing gfx for unit #1290
[10:24:15][1630]Vorbis stream finished
[10:24:17][1630]Starting track: data/music/game2.ogg
[10:24:51][1f24]Lua mem usage 1: 27644
[10:24:51][1f24]Lua mem usage 2: 25470
[10:24:51][1f24]AiMakeTurn() for neutral
[10:24:51][1f24]*** Starting naval AI ***
[10:24:51][1f24]*** Starting naval AI phase 2 ***
[10:24:51][1f24]Lua mem usage 1: 25549
[10:24:51][1f24]Lua mem usage 2: 14047
[10:24:51][1f24]Phase start: entente
[10:24:51][1f24]Unit #1294 killed
[10:24:51][1f24]AiMakeTurn() for entente
[10:24:51][1f24]*** Starting naval AI ***
[10:24:51][1f24]Removing gfx for unit #1294
[10:24:53][1f24]Unit #1177 killed
[10:24:53][1f24]Removing gfx for unit #1177
[10:25:53][1f24]bad anim
[10:25:53][1f24]Invalid frame size for animation: arrows/move2/move_25fi
[10:27:03][1f24]Asset missing: graphics\units\destroyer_100.png