You can the Reset the Board to its original Factory Configuration without reflashing.
To reset your Device, please turn power off, then short IO6 with 3V3 and turn Power back on, after that please reboot the device again.
Since the board is powered via USB, the on/off switch does not work for rebooting, this is only possible when working on the 24V side.
You can reset the Device via API (If the login details have been forgotten, only a manual reset is possible).
To call the API Channel, you need to send a POST Request to http://<host>/api.
For more Details have a look in the API Docs API.md.
{
"type": "reset"
}