Collectible Card Game Headquarters

I have a quick interface question. How do you delete a deck that you have previously made? I checked the decks folder because that is intuitive but those are named numerically so I am not sure which is which. I couldnt see a way to do this in the program but someone could point out the obvious way I am missing...

Decks you create are in C:\Magic\Program\playdeck\
-- slightly different name.

Thanks!