Yes, you can downgrade RouterOS, but only until the factory installed version, which you can check with this command:
The factory-firmware is the oldest version supported by this device.
Before contemplating a downgrade procedure, remember that older versions can contain bugs and security issues.
Follow these steps to downgrade to an older version
- Make sure you have npk packages of the same architecture type as your device.
- Upload the older version npk files to the device with FTP, Webfig or Winbox.
- Issue the command line command
- Issue the command