with the next update from ElvUI (11.12) we will rename our options from ElvUI_Config to: ElvUI_OptionsUI
The reason behind this is: Many users still think, that their ElvUI settings are stored in this AddOn. Which is not true, as always, AddOn settings are still stored in your WTF folder. To prevent this confusion, we will rename our option AddOn.
So if you downloading ElvUI manually, ElvUI are these two AddOns:
If you are using our Tukui Client, make sure the old folder: ElvUI_Config
is not anymore in your: "World of Warcraft / _retail_ / Interface / AddOn" folder, you can simply delte it.