If you are an advanced user who's used to copying files and folders and have not used the installation program to install ForScore, you'll run into some additional configuration requirements.
Under Windows XP and earlier, ForScore normally stored its data files in C:\Program Files\ForScore\DATA. As of the 2015 version, ForScore now uses the same file folders for Windows XP as it does for the newer versions of Windows.
Under Vista and later operating systems, data is normally in C:\ForScoreFiles\DATA.
When you use the installation program, that folder is created and E:\fshelp\html350\ is told to look for its data there. If you do your own thing rather than using the installer, on first run the program will pop up a screen asking to create a data folder and specify its location in the Registry. That setup wizard is shown in the section on Windows 7 and Vista.
It's also possible that you may get a message asking you to run the software "As Administrator" the first time.
"But wait," you say. "I am an administrator!"
Under Vista and later, you're only really an administrator when you're "run as Administrator".
You'll only need to do this once.
Right-click the shortcut and specify "Run as administrator."