I send myself a lot of personal challenges for testing things before I release them.
Unfortunately, I can’t delete them now that I’ve got plenty… the button doesn’t work.
I also wouldn’t mind being able to delete challenges I’ve put out there that I’d like to revoke or replace.
And while I’m at it, I can’t type in names for individual ships in the builder, either! This is kind of sad for those of us who want to make scenarios with meaningful mouse-over names.