Events+ update over wrote customization code

I had a customization set up so when someone registers for the event I can hover the mouse over the event and the persons name will appear (only the persons registered not those who have registered and then un registered)

The developer told me this today:

I'm afraid again you have to post to WPMU DEV support forum. From our finding we need a hook in 'set_event_info' method defined in 'Class Eab_CalendarTable_EventArchiveCalenda