I am looking for that answer's been a long time, has not yet found solution, leave the pop-up menu, I would also remove the "show all" my version 1.10

elgg_register_event_handler('init','system','disable_more_init');

function disable_more_init(){
   elgg_unregister_plugin_hook_handler('prepare', 'menu:site', '_elgg_site_menu_setup');
}

I am not using 2.0.1 but this is how it works in 1.12.x.

It works perfectly.

Thank you very much.

where I find this code?

This is the code for a custom plugin to do this.
You just need a plugin with only 2 files in the plugin folder; the manifest and start.php

The start.php file is where the above goes.

I'm not developer

Then we'll make you one ;-)
 

1. Make a directory on your computer and name it: 'disable_more' (or whatever you want).
2. In that directory, make a file with a sourcecode editor, or text editor, and name it manifest.xml
3. In that manifest.xml file, copy/past this:

   
   <?xml version="1.0" encoding="UTF-8"?>
   <plugin_manifest xmlns="http://www.elgg.org/plugin_manifest/1.8">
       <name>Remove More menu</name>
       <author>Your name</author>
       <version>1.0</version>
       <category>Tools</category>
       <description>Removes the more menu</description>
       <website>http://www.yoursite.com</website>
       <copyright></copyright>
       <license>MIT Licence</license>
       <license>GNU General Public License version 2</license>
       <requires>
           <type>elgg_release</type>
           <version>1.9</version>
       </requires>
   </plugin_manifest>
   

4. now, create a file: start.php, also in that folder
5. In that file, copy/paste this:

   elgg_register_event_handler('init','system','disable_more_init');
   
   function disable_more_init(){
      elgg_unregister_plugin_hook_handler('prepare', 'menu:site', '_elgg_site_menu_setup');
   }

6. Upload the directory you created into the /mod folder, and activate it.
7. You're a developer now ;)

with only two folders "manifestations" and "starphp" this activates it anger?

not folders.. two files..

Yes Yes! two files within a folder.