In the world of embedded systems, "latest" isn't always "greatest." You might seek a BOSSA 1.9.1 download if:
A powerful command-line interface used by the Arduino IDE and other build systems to automate the uploading process.
On Windows, ensure you have the "Arduino SAM" or "BOSSA Program Port" driver installed via Device Manager.
Once you have downloaded the installer for your operating system, the process is straightforward: 1. Enter Bootloader Mode
Tools to set or clear read/write protection bits on the microcontroller.