It's working flawlessly in
Sketchup 2017 !
You will have to convert the script file
AT_set_standard_views.rb to UTF-8-BOM (without BOM) first, otherwise it won't load properly in 2017.
How to do such a thing ?
1. Unzip the
AT_set_standard_views.zip archive (link above in AlexM's post. Registration is
free in case you are not registered).

2. Open the freeware editor
Notepad++ and download it if you don't have it.
3. Load
AT_set_standard_views.rb go to menu "Encoding" and click "Convert to UTF-8-BOM (whithout BOM)."


3. Save the file and exit
There is a slight unzoom factor of .95 line 59.

I turned mine back to 1 (without AlexM's permission...).
4. Put the new saved file with its folder "ArchTools" into your sketchup 2017 Plugins directory
%appdata%\SketchUp\SketchUp 2017\SketchUp\Plugins.
Copy and paste this blue text in your Explorer Address Bar if you don't know where to find it.
Reload Sketchup 2017 and enjoy your new extension.
There is an AT view submenu in the "Camera" menu and a nice toolbar shown in AlexM's post.
A life saver for all those who where relying daily on Chris Fullmer's CLF Extended Views plugin until 2017...
Many thanks to AlexM !