Unable to Add Groups

Hi,

Just noticed that .13 doesn't allow me to add groups no more.
This is the stacktrace:


5.9.0.13 Beta

NullReferenceException - Object reference not set to an instance of an object.

at Devolutions.RemoteDesktopManager.Forms.FrmConnectionGroup.SaveConnectionFromControls(Connection connectionToSave)
at Devolutions.RemoteDesktopManager.Forms.FrmConnectionGroup.butOk_Click(Object sender, EventArgs e)
at System.Windows.Forms.Control.OnClick(EventArgs e)
at System.Windows.Forms.Button.OnClick(EventArgs e)
at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ButtonBase.WndProc(Message& m)
at System.Windows.Forms.Button.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)


Hope to see a quick fix soon. This stops me from developing an Import AddOn.