Howdy Peter,
I would love to help you with this.
I am happy to hear that is a useful feature idea for you. It should be an option on your site. After renewing your license, did you update both the Pro and Core plugins? The latest versions are 4.2.x of both of those. If they are both up to date, you should be able to add single day recurrences to an event.
If they are up to date would you mind grabbing your system information and pasting it here? Make sure to use the ‘Set as private reply’ checkbox to protect your private information from the public. You can find the system info by going to WP Admin > Events > Settings, clicking on the “Help” tab, and scrolling down to the ‘System Information’ box. (Or by going to [yoursite]/wp-admin/edit.php?post_type=tribe_events&page=tribe-events-calendar&tab=help) That will give me a lot of extra information to help diagnose the problem.
Cheers!
– Brook