The remedy is described above in the pinned & closed topic by Florian. But this is not working for Russian tags. I like Apollo player, but it does not support Unicode. That is why I edit tags in MP3TAG, but then have to resave the files in another program, called Tag Scanner (ver 4.9). Otherwise I see abracadabra in Apollo. Is it possible to include this option in MP3TAG?
Sorry, unfortunately tagging files in specific codepages is not allowed in the ID3v2 standard.