Version 4.0-5.02 - in the Program Folder

C:\Program Files\NJStar Chinese WP\ 

Because non-admin users are unable to write to C:\Program Files\ folder on NTFS, we have changed to "Application Data Folder" since version 5.10

On Windows XP/2000/9x

C:\Documents and Settings\[your-user-name]\Application Data\NJStar\NJStar Chinese WP\
C:\Documents and Settings\[your-user-name]\Application Data\NJStar\NJStar Chinese WP\UserDict

On Windows Vista

C:\Users\[your-user-name]\AppData\Roaming\NJStar\NJStar Chinese WP
C:\Users\[your-user-name]\AppData\Roaming\NJStar\NJStar Chinese WP\UserDict