I assume it was installed and designed to operate by them and they had the liability if something was wrong, so they will protect this.
It's not holding the equipment to ransom, you can do what you want, as you have. Many would argue programming is IP of the company, as you have a useless bag of wires without it.
It's all in the manual but that doesn't mean you know what to do with it.
We can't give you a defined answer beyond the output we spoke about, we didn't design the system.
Maybe take the wire out of OP3 for now...