Erm, where are my decks stored?

After an hour of reading multiple guides to Forge, scanning the forum and of course looking around in my Forge file (also using the Windows 7 search function), I simply cannot find where my constructed deckfiles are stored. I have downloaded some spiffy decks from this board and I would love to try them out, but I have no idea what to save them.
Could anybody please help me out?
Could anybody please help me out?