Launch your game via the editor. While game is running, press TAB on your keyboard to open up the developer console. Now type:
exec print( localAppDir )
then press ENTER. Now type:
then press ENTER. It will open up the log file in an overlay. You can navigate between the log pages with PAGE UP & PAGE DOWN keys on your keyboard. Look for a line that contains a path along the lines of: c:/users/...
, that will be where the messages.log file will be located along with any save game files that get created. It is also where your config.ini file should be created if you decide to manually script your own config.ini.
So er yeah, anyway... after you've find out where the log file is, run the game as before & repeat the steps you took to cause the crash, then go & check what the log file says.