add info about restoring old backups

about.md

@@ -16,6 +16,10 @@ The ultimate editor improvement mod. Adds a ton of <cp>utilities</c> and <cj>imp
  * Fully customizable editor keybinds
  * And lots, lots more!
 
+## <ca>Restoring Old Backups</c>
+
+Pre-2.206 versions of BetterEdit relied on the now-defunct BetterSave mod to create backups for levels. If you have backups from this time you'd like to restore, locate the old backups at `<GD Save Directory>/levels/<level-string-id>/backups`, and then move them to `<GD Save Directory>/betteredit-level-backups/<level-numeric-id>/backups`. The string ID (`<level-string-id>`) of a level is likely very close to its name except converted to kebab-case, and `<level-numeric-id>` can be seen in-game in the created levels list by enabling the `Show IDs in Search` option from the `Editor Level ID API` mod.
+
 ## <cy>Support</c>
 
 BetterEdit is first and foremost **a passion project**, however it is also being developed by a poor student living on his own. If you would like to support development and help me out, I have a Ko-fi!