If it crashes, you should see a crash reporter window popping up, and send the crash report from there. In certain situations the crash reporter does not appear, for example when the crash happens inside the graphics driver. That usually means a hw problem or a problem with other drivers.
The eng.log file can be found in the Outerra data directory, chosen during the installation. By default that's c:\users\[yourwinname]\Outerra\eng.log
You can send it to support at outerra.com