After talking to someone on the x10 discord server I was told that the delete button was somehow being abused. I'm not sure how that's possible, but I was also told that the x10 team is working on some security improvements and the delete button will be re added.
I've recently added a domain to my account and decided to scrap the project that the domain was going to be used for. When I tried to delete the domain I could not find the option to do so, so I talked to someone on the x10 discord server and they said to make a request on the support forum. Can...