Comparing with the main windows of version 1 and version 4.1, they look very similar. And actually the higher versions look simpler.
As the program is used by large varieties of audiences, we generally let the users decide whether to turn on new features provided, when they feel they need something more. Many of the new features may be activated only when appropriate checkboxes get checked in the Options window.
Though the default features of Open Contacts have already suppress many other address book programs, if you are feeling that you want more from Open Contacts, it is time to evaluate those settings in the Options windows after reading "What's New".
