September 1th, 2014
Mentionable new features:
Added option to set window order.
Added option to show folders and folder count in Treebar.
Added ability to enable/disable channel/server monitoring of a window.
Added several ways to lock AdiIRC with a password, see /lock.
Added scripting support for custom Listbox, DDE and COM.
As always you can see the full changelog here.
md5/sha1/pgp hashes for both stable and beta releases can be found here.