Removing Unwanted Directories in AMR

Just wondering how I can remove all the unwanted directories I have in AMR - I have over 10,000

I want to import a new list but I don't want it to have to retry all my old ones when I sign up

I have tried selecting them all and marking them as blacklisted but they still show up

Suggestions?

OK just realised I was being a dope and didn't notice it removing them at the bottom of the screen lol