We have now started the development on version 2.12, where for now the focus is on implementing a lot of the requested features from the users, starting with the smaller ones. All the changes can be seen in the ongoing changelog in the forum: http://theairlineproject.net/forum/showthread.php?tid=1308.

A couple of the new features are the possibility of asking an airport to upgrade its custom to international and the feature of assigning an aircraft directly when creating a new route