Hi! Simple question, how do I delete the imported designs I made for the custom icons/images? I have a growing library of failed items, and I'd like to clean it up. ^^

Save the map, create a new or open another map, the library will refresh. when you open the original map will be there only the ones still in use. sometimes this bug a little and one or two don't go go away, either because you haven't deleted all instances of it or the editor thinks it hasn't been deleted, close the map e open again and it probably will resolve the problem.