The new GUI features will only be seen if you download a development build, like a public beta version.
Go to you NWN steam page, click the gear icon "Manage", click Properties, click Betas, choose the build you wish to activate. Steam will update your game. You can revert or further update your NWN install using this same method.
NOTE: Development builds are not stable build, and you may experience problems, also, any work you save in the toolset or games saved using that build, will thence forth require that patch, or better, to work.
Eventually, development content will become active. Development builds do not automatically install and you must opt-in.
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Go to you NWN steam page, click the gear icon "Manage", click Properties, click Betas, choose the build you wish to activate. Steam will update your game. You can revert or further update your NWN install using this same method.
NOTE: Development builds are not stable build, and you may experience problems, also, any work you save in the toolset or games saved using that build, will thence forth require that patch, or better, to work.
Eventually, development content will become active. Development builds do not automatically install and you must opt-in.