(Change)" goes back to the URL chrome-extension://gmbmikajjgmnabiglmofipeabaddhgne/options.html your Settings page, so you can change format (like different angles of a camera, .MHT, .HTML, or Google Docs format, made like for a scientist too) immediately and make sure your Google has multiple formats saved/archived:
Warning: That means it will pop-up a new tab you need to watch for, it will leave your current position and switch to
Settings, so please have enough browser system memory. Check Chrome's menus to use `Task Manager' for browser memory leaks, because mine says "100k" (somewhat stable system process reading but even official Google extensions can be volatile and not explain with a mature error message) of memory used. Archiving takes memory.
(I was scared to click the random word "change" could have so many meanings, so I did not know either, and Google should specify that before sharing; "
(change)" meant "Rename" to me, given the file name is adjacent to the word, however clicking "Rename" sounded saner if I had to guess, which is guaranteed given it is not a documented feature, we all had to guess what the dear Googler meant by "
(change)" just leaving it like that as "