Is there a faster way to clean out my library?

The topic sums up the question but I'll explain in detail. Over the years I've GM'd several games and in that time I've added a lot of stuff to my account's library of pictures, music, and things that take up storage space on my account. I am now over my storage limit, and I started trying to clean out all the stuff I've saved up over the years. The only way I know how to do this is go into a game, open up my library, and individually delete files. Is there a quicker way to do this for my account, like a way to select a huge portion of files all at once and delete them? Or some "delete everything" button?

If you click on an item in the art library, it should bring up a folder view window where you can select multiples to delete at a time.  You still can't delete all at once, but being able to select 10-20 at a time is better than one at a time.