"Discounted pricing on ALL our product line; available on our Kagi store."
is misleading and needs to be clarified. There are bundles in the Yazsoft store, but if you already own their products and want to add just one more, no discount for you. You either buy more of the item you already have, or you pay full price for the new product you want to buy. For me at least, it's less expensive to pay full price for ShareTool. Since I expected discounted pricing on "ALL our product line," I decided to skip the purchase.
I wrote Yazsoft about this, to be sure I hadn't missed something. Nope. That's the way it is.
(Version 1.2.9)