GE SYMSAFE4 Plus 2 reset to factory defaults

[JustGaryNet 0]

I acquired a GE Security DVR part number SYMSAFE4+2-160 from my previous company as they closed the US office. I kept in a box till now, and am unable to log into the DVR. I have contacted all the previous users and no one remembers the password. I see that GE Security no longer exists and that Interlogix appears to have bought that division. Does anyone know how to reset this DVR to factory settings? I have the manual that came with it and know the default user passwords, just need to know the secret way of resetting the software to back to default settings. Thanks in advance.