Just updated the editor

http://www.jaggedallianceflashback.com/uploads/JAFPublicEditorv0.6.zip

Please see the How to mod thread for more info. 

For Mac users it's a bit tricky our Coder wrote the following: 

First you need to expand the package in finder, find the contents and Data folder and then in unity open the preferences window, press open in the path line, and then drag the Data folder from one finder window to the unity's open window

You cannot set the path to a folder inside of an applicaiton package otherwise

Will see if I can add a more detailed way to the How to at a later point.