That really is very poor indeed, and the fact that he may be working on an upgrade does not excuse him from completely ignoring paying customers. The relevant thread in the Marsware forums is
here.
Gadget, I suggest, if you have not heard back from the developer within a reasonable period, to contact Handango (or your credit card issuer), get your money back and go look for another good weather app.
Pocket Weather is a good one and the support at SBSH is second to none.
Hope this helps. Let us know how you get on.