Hi Brad,
my version at the time of the “accident” was:
the 4054, Lite version with free license, I don’t know exactly how it could have happened, but surely due to my clumsy maneuver…
now I updated to 4056, and I did as Dave’s advice to modify the Settings.json file after closing Cantabile, and then saving this everything is back to normal, but having learned that right clicking on the onscreen keyboard allows Dave the curtain to choose 4 options among which to unpack the keyboard,
I don’t have these options, so the only way to get everything back to normal is to edit settings.json…
anyway thanks
problem solved happily!
Franco