There is a way to see what's updated, as I've done that before. I just don't recall where I got the link, but it would be part of your account and purchases.I shall have to go find my update over at Rendo! They do put them in our purchases, right?
OR do we have to go to a particular place to find them, like HW?
Other than that, all of the items you've purchased should have an update "date" (if there has been one) over on the far right of each purchase.