I suppose I'm not exactly sure what you're seeing, but on all of the hubs I looked at, the "network reset" button on the bottom of the hub does look gold, so it's possible you have the right thing. A blunt but relatively small object like the tip of a pen should be enough to press/hold it.
The button on the bottom is not a "factory reset," nor is that option available anymore, in no small part because it was often used for caes where it wasn't necessary, ths being one. 
A soft reset would be more than enough to take care of this problem (a network reset, which is all that button does, would really be enough--if it does indeed work for you). Since you saw it there before, it's likely you were running an old hub version of the software and it got updated for you at some point.
My suggestions would be:
- make sure you're using a good power supply for the hub (any 5V and 1A or greater power supply like the one included should work, but it can't hurt to try another)
- try another soft reset -- it's odd you'd get an error about a corrupt databaes when it should be basically brand new, assuming you didn't choose to restore anything
- since you already contacted support, see what they say when you hear back (I assume you used the new support.hubitat.com website instead of e-mail, but if not, I'd do that insted), and if you don't hear back ni a while, one of us can tag them here.
To switch your hub to a new account, you can either:
- Log in to my.hubitat.com and use the "Deregister Hub" option (this is really the only thing a full reset would have done that a soft reset plus resetting both radios wouldn't have), then you'll be able to create a new account or choose a different one next time the hub is set up; or
- Create the new account with the new e-mail address, if you haven't already, then, also from my.hubitat.com, find your hub, go to Hub Details, and use the Replace Admin feature--using the new account as one to replace the old one with.