Deleting libraries in EagleFiler

I have an Eaglefiler library that refuses to be deleted. I’ve tried dragging the entire library folder to trash (and empyting the trash), but it always returns. I have been able to delete most of the contents of the folder, but I’m left with “To Import” and the main folder itself.
I’ve also regularly been getting an error message (can’t remember the exact wording) something like Eaglefiler having trouble indexing libraries…(no surprise I guess!)

It sounds like maybe you tried to delete the library while it was open in EagleFiler. First, close the library and/or quit the app, and then move the folder to the Trash and empty it.

That worked.