Thanks Cameron for using the free version. Currently, there is no available. But, we can update in new version if you want same custom URL in all Learn More button. It might not be feasible to add custom url in each slides. If you need it, you can hire a customizer : https://evisionthemes.com/request-for-customization/ to create a child theme and fix this feature.
Hope, you will understand.
Regards,
eVision Themes Support