I cannot understand some designs starting with NBW1; NBW 2, till NBW21 are missing or I cannot find them in my software. I would be grateful if someone could help me. Thank you and God bless. Bernadette de Souza.

Just an idea (I do not have a Janome)
Here you have an entry with a Designer Software GALLERY program.
If you are brave, disable the Auto-Installing option at your computer, download the files and open them manually- then have a look if some .jef files are included, maybe these are the designs you are looking for.
I did this with the free EOS viewer software and found about 40 freebies.

you have to keep up with the updates they are on the janome website. the blackworks were in one of the updates.