void showHash_Click(object sender, EventArgs e)
        {
            Model.InvokeAsync(delegate(object s, DoWorkEventArgs arg)
            {
                var data = arg.Argument as dynamic;
                HashInfo info = new HashInfo(data.Backup, data.File);
                arg.Result = info;

            }, delegate(object s, RunWorkerCompletedEventArgs arg)
            {
                if (!arg.Cancelled)
                {
                    Form info = arg.Result as Form;
                    info.Show(Model.Window);
                }

            }, "Hashing...", true, new { Backup = SelectedBackup, File = SelectedFiles.FirstOrDefault()});
        }