Billion 8800AXL Query

[#1]

I have a new toy to play with, an 8800AXL and it has more settings than even a compulsive fiddler like me could get through.
However there does seem to be one button missing...a log off button.
My previous 7800n had one but I can't find one on this beast.
Closing the relevant tab leaves me still logged in and shutting down the entire browser session does log me out but there are many occasions when I wish to leave other tabs open.

[#2]

You could ask here.
http://www.billion.uk.com/forum/index.php
There seems to one guy there who works with/for Billion. If it isn't there now he may be able to have it added. 

[#3]

The Billion UK Forum is where I read about shutting down the browser