Unable to login to ORBI as Access Point

I just purchased the Orbi today and set it up in AP mode with my nighthawk x6. I was able to access the Orbi and update the firmware how Pete mentioned. I just accessed my main router and looked at the attached devices for the Orbi (in my case RBR50). I also reserved the IP under LAN settings so it doesn't chsnge. I can access it one of 3 ways. When connected to my main router, just type in the IP I located from attached devices, if wifi device (PC, tab cell phone, etc.) is connected to Orbi wifi, just type http://orbilogin.com, or open netgear genie (I think you mentioned you could do that). I still haven't turned off the wifi on my x6 either. The orbi router and main router are 40ft apart in different rooms with cat6 running through the attic. Not sure if that's an issue, but I like the extra wifi connection for that side of the house for my google play devices, and I'm not experiencing any issues with 21 attached devices (PCs, Xbox, Tv's, Chromecast, NAS, etc.) This also allows me to access the main router via wifi and get to the Orbi settings using the IP I reserved or I can still get to it with my desktop PC that's hard wired to the main router.