delete fields does not work?

Hi Xnau,
I tried to delete some fields (both standard fields and fields that I created myself), but the keep appearing. I tried both in a website that is already online and in a website that I’m using offline (with Xampp) to test plugins. In the last case I changed the theme and turned off all plugins but PD, but that had no effect. In both cases, there are no records yet.

I found a solution in an old thread about this problem: https://wordpress.org/support/topic/plugin-participants-database-the-delete-function-on-main-fields-page-doesnt-seem-to-work.

I wondered if this is still the way to resolve the problem, because you announced this would be resolved in an update, but I cannnot find it in the changelog.

https://wordpress.org/plugins/participants-database/