ID:1313132
 
its called "npbyond.dll"

Anyone want to speculate about it, go digging for more info?
It's NoproblemBYOND.dll contains all the feature requests and bug fixes from the two forums, you just need to activate it somehow :P

I have no idea why you have it? it's not in the latest

http://www.byond.com/download/build/499/499.1199_byond.zip
It's not new, afaik. It's the DLL that the Firefox plugin calls ("BYOND stub plugin for Mozilla 1.0.0.1"). "np" probably stands for "netscape plugin" or something.