Hide Missing and Expand All don't work. I appear to have fixed this by changing line 122 to:

var stableHideMissing = document.querySelector("div.stable > div.standard-sidebar > div.filter > div.form > div.form-group:last-child input");

(added div.filter)

And changing line 132 to:

var stableShowMoreButtons = document.querySelectorAll(CREATURE_ROW_SELECTOR + " > .btn-show-more");

(div.btn-show-more became .btn-show-more. button.btn-show-more also seems to work.)