Press ESC key and open the menu "Addon settings", not "Settings".
If there is no addon settings menu then the addon is either not loaded (Press ESC -> open the "Addons" entry and check if the addons are shown properly) or it got no settings menu, but only chat commands (check the addon's description text to see which commands are available).
Which language are you using for the ESO client? French?
What addons are shown as "loaded" but do not show a settings menu? Please give some more details and addon names, and please check if the extracted addon ZIP files are in the correct folder.
Read this please:
http://www.esoui.com/forums/faq.php?..._howto_install
http://www.esoui.com/forums/showthread.php?t=6643