"Very easy to use and intuitive"
— Alexander Koper What They Say

Why don’t the extra options with Custom Recurring Events show?

If you installed the Custom Recurring Events add-on but do not see its extra recurrence options, please be aware that they do not appear until you have chosen either “Weekly” or “Monthly” for Recurrence.

If they still do not show, go to Plugins and double check that the Custom Recurring Events plugin is both installed and activated.