Hi,
Finally I had two days for the code. I fixed several bugs and revised the old examples.
The GUI still has bugs. For example, the menu item "View/Input Window" in MainWindow doesn't work, and so does some of the "close" buttons and "on/off" buttons (e.g., the window opened by "View/Concept Content"). I hope Jean-Marc can find the time to go through all the GUI components (specially buttons and menu items), to make sure they all work as before.
I'll try to spend a few more days in the coming weeks in the code, and hope to release 1.5.4 in mid-May. Then I'll probably leave the code as it is for a few months, until I have time for it again.