删除指定天数前的文件，能设定每天定时运行，能指定文件的扩展名，可区分文件的修改时间和创建时间，设置好后还可加密码，并且可最小化到托盘图标-delete the specified number of days before the document can set regular daily operation, the document can be designated extension, The document can distinguish between modified and the creation of time, but also set up a good password after, and can be minimized to the tray icon