Got it!
In my Arena repository there is an engines.ini file dating back from 2013, that looks to list most known engines at that time, with preset information.
Includes, short extract:
Code:
Chesley_r289_ja=Matthew Gingell;USA
Chesley_r289_x64_ja=Matthew Gingell;USA
Chesley_r300_ja=Matthew Gingell;USA
Chesley_r300_x64_ja=Matthew Gingell;USA
Chess=Evgeniy Korniloff;Russia
Chess0-v0.3.2-win32=Claudio M. Camacho;Spain
Chess-at-nite=F D+P L+R P+T G T;USA
ChessAlex=Alexander Turikov;Russia
ChessBin.com=Adam Berent;USA
(_ja stands for Jim Ablett compiled version

)
From the CPW, about Korniloff: "
He is author of the chess programs OBender, previously known as QChess and Chess,..."
I suspect: for some reason the Arena search within this reference file stops on 'Chess' that fits 'Chess-System...', short sighted.
At first, I didn't reproduce the issue as my exe file is "polyglot".exe
Tried using the CSTal2 exe instead, E. Korniloff and Russia flag appeard.
All the best,
Eric