Hello,
in the main program /usr/bin/shellter the name of the called progam is false:

#!/bin/sh

kali-winexec "/usr/share/windows-resources/shellter/" "shellter.exe" "$@"

Please, look at the changelog for debian:

shellter (7.1-0kali3) kali-dev; urgency=medium

• Switch to kali_winexec

  -- Ben Wilson <[email protected]> Thu, 13 Jun 2019 10:59:47 +0100

I'm using now the correct name, and shellter runs

Bye
Rose