omny nvr 16/2 poe password reset

[selope]

Good evening dear all,

I am captain on the yacht; we bought a used Motor Yacht, and there is an NVR system OMNY NVR 16/2 Poe and many cameras, even 2 pieces of big PTZ cameras.

I reset it all and start to use it with DVR because I can't reset the NVR, and I don't have the password. 

I ask for help from the OMNY. 

They ask for a receipt, but I didn't buy this NVR, so any idea how to reset the pass? Thank you very much.