A fixed version of the search program can be downloaded from the FFHS website, link as follows:
http://www.ffhs.org.uk/projects/nbi/NBI3_Program.zip
Installation instructions:
1. Select the option to Save the file (NBI3_Program.zip) on your computer (it doesnt matter where). This is a compressed (zipped) file.
2. Double-click on the file to unpack it, it should create arnsingle file SETUP.EXE.
3. Run SETUP.EXE. You shouldn't uninstall the NBI first as Setup.exe only installs the Viewer program, not the datafiles. It defaults to the same folder as before, i.e. c:\Program Files\NBI3, so if you originally chose another folder you'll need to change the folder name. It should overwrite the old versions of the program (NBIView.exe) and help file (NBIHelp.chm).
Once installed you can delete the files NBI3_Program.zip and Setup.exe afterwards if you like, to free up the space.