Try loading up another game with it. If that doesn't fix it, clear those files, and re-download the mods. I believe that's an issue with corruption, but I'm not sure.
Is there a manual which lists all the changes, buildings with requirements, wonders etc?
where here? How can I get itHere, I have a copy of what was changed from G&K to NiGHTS:
yes
Any chance of a Brave New NIGHTS in the future?
So it's been awhile... Sorry for this lapse of communication everyone - I'm in the last semester of my degree now and will be graduating in April - that's mainly what's been eating up most of my time.
I'm currently shooting for an end-of-April / early May release for Brave New World. Worst case scenario early Summer / 2014. Thanks for sticking with this mod 3-odd years after initial release.