I had a short go with your examples and found these Errors and mal functions.
Programs also should work, even if the user don't do the right things.
Here what I found:
BitOps --> Start the program and at first of all push a Button (not 'Quit' ) --> ERROR
ColumnView Example --> Start the program and at first of all push the 'Reset' Button --> ERROR
FileOps --> 'Help' points to '/root/My Documents/Gambas for Beginners/FileOps/Help.html'
KbdOps --> ESC don't QUIT
ListViewExample --> enter an item twice --> ERROR