In your current manual: http://www.fwbuilder.org/4.0/docs/users_guide/UsersGuide4.pdf
Please note some incorrect references in your UserGuid4.pdf;
1. Current version is 4. reference to the current manual is version 3
Page 11: http://www.fwbuilderr.org/UsersGuide3.pdf
Should be: UsersGuide4.pdf
2. Page 11: You have multiple fwbilderr in your links
Should be: fwbuilder
Thanks for reporting this. These will be fixed in the next release of the UsersGuide.