I'm using Windows 8.1. By default the software installs into
C:\Program Files (x86)\Responsive Software\Ledger
However, if you click on C:\Program Files (x86)\Responsive Software\Ledger\Ledger.exe
you'll get an error - the software has a bug .. it 'hard coded' looks for directory C:\Program Files\Responsive Software\Ledger\Database
So to fix and run:
1) Copy
C:\Program Files (x86)\Responsive Software
to
C:\Program Files\Responsive Software
2) Click on
C:\Program Files\Responsive Software\Ledger.exe