Hi Mike
The version just fixed some issues causes by change in Joomla core in version 3.5.0. They are:
1. When you create a registration record from backend, you could not select existing users.
2. You could not save Permission in Events Booking
3. An issue with edit registrant in the frontend permission checking
4. Fixed Export registrants issue in PHP 7
So basically, the change in version 2.4.2 is just to make sure the extension works well in Joomla 3.5.0 and PHP 7. No new features added to that version
Regards,
Tuan
