Thank you Kailash!
I'm quite familiar with "old DOS", but didn't know that "Command" allows that (while WinExplorer doesn't). And for such simple thing.... who would bother to read FAQ :-)

It may be of interest for others too: In Config example, there's explained (if I understood correctly), that ".ExifTool_config" file can be in "working" directory too (which I undersood as "current" directory). But that doesn't work: so I've placed config file into Windows directory -and now it WORKS :-)

Thanks again to both... best wishes,
Bogdan