Unable to Access Advanced Tab in Routerlogin Portal After Firmware Update

Mate this is rubbish.  You can't log a job if you don't have a current support contract and most of these issues are effecting people who have had these routers for over a year or more and probably don't have a current support contract.  It is a good way to get extra cash out of people but if this is Netgear's new business model then I'm not sure you will succeed in the long term.  

Why would someone take out an extended support contract when its over half the price of a new router.  Advice to factory reset a device and start again is akin to asking "have your turned it off and on again.  That won't fix poor change management practices, sloppy coding resulting in interface problems introduced between router firmware upgrades.