The Gluon interface is so lean I'm not even sure where to find the version info :/
But the situation was that an artist I was working with created a new file and checked it in. I hit 'update workspace' on my machine but the file didn't show up. So I went to 'configure', navigated to the folder and saw the file as shown in the image attached to my original post, green checkmark and text. Without changing anything, I hit 'apply' and the file downloaded.
This doesn't happen very often and I haven't been able to determine what we're doing differently on the occasions when it does occur. So I assumed the green highlight meant something, but wasn't able to find anything specific in the documentation.