How to create torrent files?

Since v3.5.0.182B, 'Create New Torrent' was integrated into BitSpirit, you can launch it via 'Functions'-'Make Torrent':

About 'Directory (One By One)': If this option is choosed, BitSpirit will generate .torrent files for each file under source directory. i.e, If there're 5 files under source directory, then 5 .torrent files will be generated.