Use a static array instead of a stray variable for DataBoard keys.

src/General/DataBoard.coffee

@@ -1,6 +1,6 @@
-DataBoards = ['hiddenThreads', 'hiddenPosts', 'lastReadPosts', 'yourPosts', 'watchedThreads']
-
 class DataBoard
+  @keys = ['hiddenThreads', 'hiddenPosts', 'lastReadPosts', 'yourPosts', 'watchedThreads']
+
   constructor: (@key, sync, dontClean) ->
     @data = Conf[key]
     $.sync key, @onSync

src/General/Main.coffee

@@ -26,7 +26,7 @@ Main =
         Conf[parent] = obj
       return
     flatten null, Config
-    for db in DataBoards
+    for db in DataBoard.keys
       Conf[db] = boards: {}
     Conf['selectedArchives'] = {}
     Conf['archives'] = Redirect.archives

src/General/Settings.coffee

@@ -169,7 +169,7 @@ Settings =
       data =
         version: g.VERSION
         date: now
-      for db in DataBoards
+      for db in DataBoard.keys
         Conf[db] = boards: {}
       # Make sure to export the most recent data.
       $.get Conf, (Conf) ->