Hi,
That’s currently a commercial feature: https://wptimeslot.dwbooster.com/images/articles/edit-booking.png
We’d like to help but we can’t reply about that in this forum. We are not allowed to support any customers in these forums.
For pro or commercial product support please contact us directly on our site. This includes any pre-sales topics as well.
Commercial products are not supported in these forums. We will happily answer this and any other questions you can have on our own site.
Thank you.