/** Clear all state, including MD5 database. */
private void clearButton_Click(object sender, System.EventArgs e)
{
Debug.Assert(this.InvokeRequired == false);
listView.Items.Clear();
kb.Clear();
knownHashesLabel.Text = "0";
unmatchedHashesLabel.Text = "0";
hashErrors = 0;
EnableAlert(false);
}
