For current RouterOS devices, download the latest version directly from the official MikroTik download page.
Here are the defining features of the Winbox 2.8 architecture: winbox 2.8
Winbox 2.8 includes a built-in file manager to upload, download, and delete router files (e.g., backups, scripts, or hotspot files). Unlike FTP, this works through the same secure Winbox session. For current RouterOS devices, download the latest version