The file can be located here on Win7 systems:
So, for Focaltron's GA Sim the log file is located:
The directory c:\ProgramData is hidden by default. If you don't see it you must choose to show hidden folders:
1) Open a Windows Explorer window
2) Click on the Tools (press ALT once to show the menu) menu bar item
3) Click on Folder Options
4) Select Show hidden files, folders and drives.
5) Click on Apply