No special installation process is required. When you install Scientific Notebook, the Exam Builder is installed automatically as ExamBld2.exe in the #45#>SciNotebook folder.
The installation program doesn't supply a desktop icon for the Exam Builder. Instead, the program is called automatically any time you open a file with the extension .qiz. You can run the Exam Builder as a separate application directly from a DOS prompt or you can create your own Exam Builder icon and then click it to start the software (see your Windows documentation for instructions).