Andreas Röhler <andreas.roehler@easy-emacs.de> writes:

Please see at the center top displayed "*scratch* - GNU Emacs at affe"

The latest word is taken from the hostname. Want to replace this by
the Emacs versions number.

You want `frame-title-format', not `icon-title-format'.

Ah, okay, sorry. And that works nicely:

(set 'frame-title-format '(multiple-frames "%b" ("" invocation-name "@" emacs-version)))