I've just uploaded the first update to my Gesamtausgabe app
The improvement I find most useful is that the search box now provides hints as you type:
It also automatically diacriticizes certain words. It'll convert "Zizek" into "Žižek" for those of us without a Slovenian keyboard. It does fuzzy searches when there isn't an exact match.
If you're not already using the app, there's more information about it here