Access via the App

I have (finally) been able to login to 192.168.1.1 to update the password on my router but still can't connect to my RBR750 router via the app on my iPhone.

1. Does anyone know if there is a delay in propagation of the password change?

I see there is some kind of fix being rolled out by Netgear but I don't know if I have it - or if that would fix the login via the app issue.

2. Does anyone know how I can get the update or how I can check if I have the update?

Many thanks,

Blair.