If this file exists, then the engine will try to generate shadows under the application’s windows.
If you want to disable these shadows, then do one of the following:
  a) rename this file (recommended)
  b) delete this file.

To restore shadows, you need to do one of the following:
  a) If you have renamed the file before, then rename it back to its default name: EnableWindowShadows.txt
  b) If you have deleted the file before, then create the file with the same name: EnableWindowShadows.txt

All changes will take effect only after restarting the application.

AV Bros.