Oh, well in that case, just go to your MasterPages/ folder and open "ChatPopup.Master". If you want to replace the company logo with text you can do so by doing some slight modification on the image tag on approximately line 24. Please note that you don't want to remove that image tag as it will cause your application to not work anymore. It needs it in the server side code to function properly.
Basically, you just need to wrap a <span style='display: none'> </span> around this image. This should hide the image. After this, you'll want to place the text of your choosing just after the closing </span> tag. After all this is done just save the file and log back in. You should immediately see your changes.
Shouldn't be too difficult if you have some background in Html. There really aren't any other ways to replace that image in the current version of SmarterTrack.
Hope this helps.