Drawing Format Trash

I was recently trying to incorporate a customer's logo on a drawing fromat. I've done this before with no ssues. For some reason SW wouldn't accept the picture (jpeg) I triad a few time, well more than a few, im stubborn and gave up and made the sheet format without his logo. No big deal really. Here's my question. Now when I start a new drawing and pick a sheet format they are all there but there are other empty formats there as well. they start with ~\$. How do I get rid of them? I looked in the directory where the formats reside but they dont show up. I thought they might be hidden files, they weren't. It's not a big problem but it annoys me. Does anyone know how to purge these things.

SolidworksDrawings And Detailing