Ummm…downloaded Hammy’s SW in MKV and plays perfectly; fantastic presentation through my blu-ray player!
I tried adding the subtitles with the MKV indications, but I must be doing something wrong.

I added the movie and the .sup files to MKVToolNix, started Multiplexing and finished.
Played the file, which plays fine, and the blu-ray player movie info shows there are subtitles to choose, but doesn’t choose them.

They appear in numbers…1, 2, 3, etc., instead of the names for each.

Any suggestions or where may ask for help with this?