Always back up first. A single wrong delete can wipe your world. Both
methods below assume you've taken a backup before touching files.
Important caveat: Restoring a full backup after the reinstall will put the
old game files back, undoing the update. If you only want to recover your
world while staying on the new version, restore just thePal/Saved/SaveGamesfolder from the backup — or use Method 2 below, which
is the reliable way to carry a world across a reinstall.
Pal/Saved/SaveGames/0/<WorldID><WorldID> is the long hash-named folder — it holds all of your world data.<WorldID> folder, click Archive, then download thePal/Saved/SaveGames/0/<WorldID><WorldID> the server just generated. Copy itsnew-empty.<WorldID> you copied innew-empty folder.SaveGames/0/ with the current World ID.<WorldID> folder (including Level.sav, LevelMeta.sav,WorldOption.sav, and the Players folder), not just part of it.