This is the official Stronghold 2 AI Editor, released by Firefly Studios in 2005.
Please note this editor is not feature-complete as in the case of the Stronghold Knights AI Editor. The official editor contains less features, is not as widely tested and was built out of the Stronghold Crusader AI Editor.
Several features are also reported to not work correctly such as reloading AIC files.
We have uploaded it here as an archive and so that players have a choice of which editor they would prefer to use.