For the Windows driver:
User specific configuration files are stored in %APPDATA%\3Dconnexion\3DxWare\Cfg.
The configuration files have an extension of .XML
Normally, the variable %APPDATA% is expanded as follows: C:\Users\username\AppData\Roaming\
If you cannot locate the Application Data folder, you may have to enable “Show hidden files and folders” in Windows Explorer (Tools -> Folder Options -> View -> “Show hidden files and folders”).