My review went from 1 to 4 stars - Hope this will help

When I first tried it it was in the wrong language despite that the chosen language on the very top left of the first screen WAS English. The program was just unusable because gibberish.

I found out that you have to REVERT LANGUAGE to original, start the program, close it and when you restart it THEN GO CHANGE LANGUAGE TO ENGLISH.
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Si le programme est en tchèque, au premier écran en haut à gauche, changer la langue POUR tchèque, fermez le programme, redémarrez-le et retourner mettre la langue à anglais et ça va le mettre en anglais.

Dame-Plume about Music Keys PRO, v1.1.2