Did you accept the EULA about addon usage as you started the game?
After first login it asks you if you accept the game's EULA, then addons etc. There are multiple thngs to accept actively!
If you do not accept these you might also not see any addons ingame.
Maybe the game is searching for the UserSettings.txt file in your Public folder too then, and it does not contain the proper acceted EULAs.
Check your file c:\users\public\documents\Elder Scrolls Online\live\
UserSettings.txt
Search for
Code:
SET ViewedAddOnEULAVersion "5"
SET AcceptedAddOnEULAVersion "5"
If the file does not exist or does not contain these 2 lines, check if the file exists in your other windows profile folder:
Check your file c:\users\melad\documents\Elder Scrolls Online\live\
If that file contains the 2 lines then
-backup the file in "Public" profile folder
-copy over this file from "Melad" to Public's profile "live" folder
Try if this helps to show the addons then.