I downloaded version 1.6. Haven't seen newer. And it says it supports latest Shrink version (3.4).
Seems that problem is that I just don't understand how to use this tool...

As for unpacking setup, I have WinRar 3.11 installed. It says "No archs found in specified files...". So probably the same story will be with WinZip. I'll try look in temp dir.