Onkyo receiver (TX-NR509), How to remove Pandora account?

I just set up a Pandora account on a customer's 509, and for testing I set up my own. For the life of me I can't find a way to remove my own account, which is showing up in addition to the customer's account. I'm guessing the same crappy web interface is there for at least the same generation receivers. Anyone knows how to do it? Unfortunately I didn't have a lot of time to mess with it, and there's no TV connected to it, it's just being used for music.

In case anyone finds this, I found out. I selected my account, and when the user/pw information appeared below, manually erased it, and saved. Unintuitive, to say the least, and the manual is absolutely awful regarding setting up internet radio in general, let alone details like this.

I just did it over the web interface on my phone. The manual is a real piece of crap about this stuff. The receiver was given (say) 192.168.1.20 as an IP address. I just typed that on the browser of a computer connected to the same LAN (I used both my iPod Touch and Android phone, both worked fine).

I don't know about how you do it with the receiver only, I always assumed you can just do it with the remote and arrows to flip characters around, but I might not even have tried that cause I didn't need to.

There's no reason to do this, just do what I did on the second post here. (Again, manual=POS.)
I was running this for a client at a restaurant, so I didn't notice anything and I couldn't have even if it was present.