Well, of course know that button in the config … but in the exsting plugin getting rid of unwanted changes and deprecated tiddlers is not as easy as that.
If you have the browserstorage turned on in the masterwiki - which should be active in constellations where unexperienced users shall not loose data - the stored tiddlers are automatically loaded.
Thus you have to
- Open the wiki
- Navigate to the tab in the configuration
- Delete the storage (all this without saving!)
- reload the wiki
…and then there is a high probability that you have allready imported and saved without even realizing.
This is not really what I would call usable.
Not to speak about the about avoiding the unsaved warning for users who cannot save to the server and other features which could/should be done in the done in the same draft to smoothen userexperience.
So if this shall become more usable, it is a good idea to fund someone who does this.