Yesterday evening, I exported the NSF file from my Lotus Notes with the help of a tool, that too with a very simple process, that is
eSoftTools NSF to PST Converter Software. By using this tool, you can also use your files easily, you will not face any kind of problem with this. The specialty of this software is that it can be easily used by non-technical people as well as it supports all the Windows editions of Lotus Notes and a free demo is also available for users.
More info- Export NSF file from Lotus Notes