Restore the original UI
 

Is there a way to begin from the start with your UI?
By that i mean No addons, No savings from addons, Like a fresh install...
Without reinstall WoW.

delete the Interface folder then open the WTF folder, inside is the Account folder open it,then you should see a folder with your account name delete that folder and you should be back to original state.

worked 100% tnx