try e mailk the autors:
"my goal with FireBird was to combine all the best ideas, features,
and strengths from the IppoLit chain of releases:
IppoLito, RobboLito, Igorrit, and IvanHoe, into one engine.
FireBird is based on the IppoLit family of engines, more info here:http://ippolit.wikispaces.com/
for new releases, fixes, and updates
this chess ship is a truly glorious achievement of the
October Revolution and Decembrists movement!
as the only souce I can find is for 1.31:http://www.chesslogik.com/downloads