Check carefully sometimes it does not have a name and it needs paperclip to press the button.
Look at this
![](https://ip.bitcointalk.org/?u=https%3A%2F%2Fi.imgur.com%2FwVUR4Y1.png&t=663&c=fvGek31eBVk0lg)
If it doesn't actually have a button then try to use Management Tool from ebang you can download it from here
http://miner.ebang.com.cn/article-8.htmlLet see if you can access it through that tool and change pool.