It's gona be a long story...
I have re-installed the bigger file, and then the smaller one and nothing is changed. I do not get the Forte shown as a possible default synth and option/scan for new synth does not bring anything either.

Buuut, at least the Cool Synth is working! Actually I do not think this has something to do with the re-installation. Choosing the Cool Synth and clicking ok results in the screen closing down without further news.
And since I am not fluent in "3 fingers" I have certainly made it wrong in the first place, when I tried it after installation yesterday..

Before I go to bed (Worshipers of Band in a Box are old folks and have to take care of their health), I will try to re.install BiaB without the Sforzando...
Bernard