Norton Mobile Security on Samsung Galaxy S2

Hi, folks. I've just installed NMS on my wife's Samsung Galaxy S2. Unlike my Galaxy S5, there is no settings menu to access.

Only showed on install, but when launched no menu, therefore I can't run Live Update manually.

The same applies when I launch Firefox on her phone. No settings menu shows.

Maybe these  apps work differently on her older phone ? Any ideas ?

Fyi, both versions of NMS installed via the NSBU UI, and both activated and showing in Devices in my Norton Account.

However, when I sign in to here   https://mobilesecurity.norton.com/  it just keeps trying to load, and no devices are shown. frown