Rizla
As you can see it's no big deal to uninstall PRS+ or ZORK or even reanimate an ereader.
If you want to take the risk, there is another (new)
version online.
So far as I can say, ZORK-icons will not find it's way into the 'normal' PRS+.
What will find it's way is the improved navigation and CSS-tweaking (font size, line space, ...)
A.