Hello federico.madona@e-novia.it,
Unfortunately I could not replicate your issue yet -- the only thing I am suspecting right now is the length of your path. In this regard, I have tried different path lenghts, and depending on that it will crash in different places. The explanation is simple - let's take a few examples: if you open a model, the path to the model itself can be too long, and the model could not be opened. If that is good, if you build the model, the path to the compiler might be too long for example. You can expand to many more use-cases this way.
This being said, my advice would be to make a clean install of the toolbox in another place, with a shorter path. Please let us know if this fixes your issue.
Kind regards,
Razvan.