How to change nvr unlock pattern?

[abrogard]

Years ago I bought an unbranded nvr from you to go with my recently purchased dahua cameras. It always comes up with an 'unlock pattern' where we have to draw a continuous line through an array of 9 buttons.
I have forgotten the pattern.
I can get into it via the onscreen keyboard on usb attached vdu or even via the 'webservice' and inputting the url of the nvr to my browser (firefox).
But I can't find the place to set the password and/or the pattern.
To recover the pattern would be nice because at the nvr it always pops that option up first and having to close it and having to input the password via their little onscreen keyboard is tedious, slow and clumsy.
Anyone got any experience with those ancient by now nvr's and can help?

 

[bigredfish]

Only way I know, because you can gain access via the web GUI is to full factory reset the NVR from there

 

[abrogard]

I might finish up doing that. It drive me barmy. I can't figure out how it works. It has sat there for about five years and all we do i check the recorded movement stuff when there seems a need. Caught a car thief that way. But if I ever knew how to set up cameras on it - and I must have done - I don't know now and can't see any sense in it.
I've got only two cams on it right now. One ethernet and one wifi. A couple of days ago it saw them both - i mean I could see the streaming from them.
Then today it can only show the ethernet one. Then a few minutes ago I play with the login pattern thing a bit more and now it displays no camera at all !
what to do? I'd expect click on that screen perhaps and do 'search' or see the details of the cam for that screen but no, nothing.
I find a registration page and it has six cameras on it. Obviously old configs of cameras I've put on. Very hard to figure out which are the working two but I make best bets and delete one of the others.
It goes away. Then comes back later.
I see a camera with an IP 10.1.1.65. What's that about? All our cams are on 196.186.0.x
And I suspect that cam has two IP's : that one and a 196 one.
Truth is I don't understand it and can't really use it.
Hope the new ones are better.
Probably time I bought a new nvr and a couple of new cameras.