HCL Support has published an article KB0101159 in the Knowledge Base on how to find out the exact build version of HCL Notes including FPS and IF from the command line and not from the Notes UI.
These are the 2 option via command line:
1) Open the cmd then locate to your program directory(for example: C:\HCL\Notes) and then execute the command : nsd -version
2) Open the cmd then locate your program directory(for example: C:\HCL\Notes) and then execute the command notes -v c:\tmp\notesv.txt (local path where the txt file is expected).