void DeleteToolStripMenuItemClick(object sender, EventArgs e)
		{
			string cFile = TryGetCurrentItem();
			if (cFile==null)
			{
				return;
			}
			DialogResult dr = MessageBox.Show("Are you sure you want to delete this file?", "Alert",  MessageBoxButtons.YesNo, MessageBoxIcon.Warning);
			if (dr==DialogResult.Yes)
			{
				ZipRWArchive zrw = new ZipRWArchive(expFile);
				if (zrw.Exists(cFile))
					zrw.DeleteFromArchive(cFile);
				zrw.CloseArchive();
				zrwCache.Delete(cFile);
				ReloadNodeContents();
				ReloadNodes();
			}
		}