Segafults if you import a folder

1. Open muine
2. Choose File -> Import Folder...
3. Select a folder and press ok
=> segfault

Unhandled Exception: Glade.HandlerNotFoundException: The handler for the event Response should take '(System.Object,Gtk.ResponseArgs)', but the signature of the provided handler ('OnWindowResponse') is '(System.Object,System.EventArgs)'

at SignalConnector.ConnectFunc (intptr,intptr,intptr,intptr,intptr,int,intptr) <0x004b3>
at (wrapper native-to-managed) SignalConnector.ConnectFunc (intptr,intptr,intptr,intptr,intptr,int,intptr) <0x0008f>
in (unmanaged) 0x2aaab0aa5145
at (wrapper managed-to-native) SignalConnector.glade_xml_signal_autoconnect_full (intptr,Glade.XML/SignalConnector/RawXMLConnectFunc,intptr) <0x0000e>
at SignalConnector.Autoconnect () <0x0006f>
at Glade.XML.Autoconnect (object) <0x00058>
at Muine.ProgressWindow..ctor (Gtk.Window) <0x00061>
at AddFoldersThread..ctor (System.Collections.ArrayList) <0x00091>
at Muine.SongDatabase.AddWatchedFolders (System.Collections.ArrayList) <0x00278>
at Muine.ImportDialog.OnResponse (object,Gtk.ResponseArgs) <0x001f3>
at (wrapper delegate-invoke) System.MulticastDelegate.invoke_void_object_ResponseArgs (object,Gtk.ResponseArgs) <0x00063>
at Gtk.Dialog.ResponseSignalCallback (intptr,int,intptr) <0x0015f>
at (wrapper native-to-managed) Gtk.Dialog.ResponseSignalCallback (intptr,int,intptr) <0x00057>
in (unmanaged) 0x2aaaac947599
at (wrapper managed-to-native) Gtk.Application.gtk_main () <0x0000b>
at Gtk.Application.Run () <0x00008>
at Muine.Global.Main (string[]) <0x0079c>