There is two options to unbrand
For majority of users I suggest just use theming features for restyling.
In order to unbrand esility Live Helper Chat we have a module for that. So unbranding takes just few steps.
Download "unbrand" extension from https://github.com/remdex/livehelperchat-extensions and put it in extension folder.
0 => 'unbrand',
It's just enough write your own company copyright tag and replace images in "extension/unbrand/design/unbrandtheme/images". I have put all brand related images, favicon.ico, notificaiton icon and logo for back office and front office.
Don't forget to change some settings in back office.
Also enable cache after you finished all changes.
Developing application takes a lot of time. You can support application by donating. There is no company behind this application and it takes away my free time. Every donation matters and does not matter how small it is!