Hello @RobotBoi0403 !
I hope I can help you.
The first thing to note is that you won’t be able to delete an island that is already loaded. For example, if you have the island called “Gungame Parkour” loaded, you won’t be able to delete it. However, you should be able to delete any other islands. If you select an island that is not currently loaded, the “Remove” button should be enabled, and you can delete it from there.
Here is a quick guide, but you are in the correct screen anyway.
Please, let me know if it works 