zabkat support forum

Desktop detective search mode is further improved with plain string and date functions. Now your search expressions can be richer with functions that provide length of strings, can find and extract substrings and partial dates. This is a free upgrade for existing customers

use check for updates menu command (under the question mark toolbar button) to get yours or click here
www.zabkat.com/deskrule

Just before installation ended, it has shown this error message.
A part from that, the program seems to be running correctly.

weird, can you do that again if you re-run the installer?

Nope, there must be something random I guess...