Windows Vista/Windows 7:
C:\Documents and Settings\<Your Windows Username>\Local Settings\Application Data\Ironclad Games\Sins of a Solar Empire\Setting
or Windows XP:
C:\Documents and settings\<Your Windows Username>\Local Settings\Application Data\Ironclad Games\Sins of a Solar Empire\Setting
Open the user.setting file (using Notepad, Wordpad or any text editor) and scroll down to the bottom 7 lines from the bottom is the line:
LogOutput FALSE
Change FALSE to TRUE
LogOutput TRUE
and from then on any Log files will be saved to the debug folder:
Windows Vista/Windows 7:
C:\Documents and Settings\<Your Windows Username>\Local Settings\Application Data\Ironclad Games\Sins of a Solar Empire\Debug
or
Windows XP:
C:\Documents and settings\<Your Windows Username>\Local Settings\Application Data\Ironclad Games\Sins of a Solar Empire\Debug