The version of John Miller's Piano Roll Box Label Maker (PRBLM)
program that I have installed is not a registered version thus
I cannot import new label images. Does anyone know how I can buy
or obtain a registration key?

If anyone needs the unregistered version of PRBLM it is available
from my website at

https://mastertouch.bookproduction.org/downloads.html 

Please note that it does work on Windows 11.

Kind regards,

Bruce Welch
Australia