I just tried to update to newest version:

[SEVERE] Error occurred while enabling SimpleClans v1.4.5 (Is it up to date?): Can't find bundle for base name languages.lang, locale en
java.util.MissingResourceException: Can't find bundle for base name languages.lang, locale en
at java.util.ResourceBundle.throwMissingResourceException(ResourceBundle.java:1427)
at java.util.ResourceBundle.getBundleImpl(ResourceBundle.java:1250)
at java.util.ResourceBundle.getBundle(ResourceBundle.java:777)
at net.sacredlabyrinth.phaed.simpleclans.SimpleClans.onEnable(SimpleClans.java:71)
at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:126)
at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:885)
at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:278)
at org.bukkit.craftbukkit.CraftServer.loadPlugin(CraftServer.java:178)
at org.bukkit.craftbukkit.CraftServer.enablePlugins(CraftServer.java:161)
at org.bukkit.craftbukkit.CraftServer.reload(CraftServer.java:452)
at org.bukkit.command.SimpleCommandMap$ReloadCommand.execute(SimpleCommandMap.java:281)
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:129)
at org.bukkit.craftbukkit.CraftServer.dispatchCommand(CraftServer.java:352)
at net.minecraft.server.NetServerHandler.handleCommand(NetServerHandler.java:737)
at net.minecraft.server.NetServerHandler.chat(NetServerHandler.java:701)
at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:694)
at net.minecraft.server.Packet3Chat.a(Packet3Chat.java:33)
at net.minecraft.server.NetworkManager.b(NetworkManager.java:226)
at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:89)
at net.minecraft.server.NetworkListenThread.a(SourceFile:105)
at net.minecraft.server.MinecraftServer.h(MinecraftServer.java:454)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:363)
at net.minecraft.server.ThreadServerApplication.run(SourceFile:422)

I did delete old config file, but nothing happend.

let me know if it persistes