Certificate filename:
The full path and filename of the certificate to use when signing the application. If SignTool.exe is selected, this file must be a "Personal Information Exchange" file (*.PFX). If SignCode.exe is selected, this file must be a "Software Publisher Certificate" file (*.SPC). You can click the Browse button to select the file.
Tip: If your .PFX file is password protected, you must pass its value in the Other arguments field using the /p option. For example: /p "mypassword". For more information, see MSDN: SignTool (Windows).