Just a friendly word about the new editor changes. Max has done an incredible job updating and fixing the editor. There are awesome new features like better performance and improved lighting preview (its now virtually identical to what you'd see in-game.) However, as we all know, stuff inevitably falls through the cracks given the quick pace of development.
The editor has undergone major changes, you may want to save a backup! In order to do so, you need to backup your entire natural selection 2 folder (NOT just the ns2 folder). Hopefully this will ensure no lost time or inconvenice for anybody.