Tried a lot of settings and want a clean start? The General tab of All-In-One Utilities → Tools puts any settings tab back to its defaults, and keeps a copy so you can undo it.

Reset one or more tabs
- Open All-In-One Utilities → Tools.
- Under Reset settings to defaults, tick the tabs to reset. Each one shows Customised if it has saved changes, or Defaults if it doesn’t. Select all with saved changes ticks every customized tab.
- Click Reset selected and confirm.
The tabs go back to their defaults immediately, and every feature on them is switched off.
Undo
Click Undo last reset to put back exactly what the last reset removed. Only the most recent reset can be undone.
Keep a copy first
Before big changes, export your settings under Tools → Import/Export. A file you’ve saved can be imported at any time, even after several resets.
See also Import and export settings and Finding your way around Settings.
Get the plugin: All-in-One Utilities is free, so you can add it to any site. Then, when you need more, its premium add-ons add extra features.