I don't quite understand what you're talking about -- the original question was about ingredient searching not nutritional info searching. Searching by recipe nutritional info (e.g., "show me all the recipes with less than 200 calories per serving") is indeed a feature request, and is not currently available in BigOven for Windows.
On the ability to undo your purchase -- your wish is easily granted for you, and any other customers within their first 30 days of purchase -- even on a Sunday night before Thanksgiving!
See our reply to your other post moments ago in the Help section of this board -- we'll be happy to fully refund your purchase, per our No Questions Asked, Money Back Guarantee Policy.
We're not quite like other software companies you may have experienced in the past. Our view is that we don't want anyone to be using BigOven who doesn't enjoy it and get a lot of value out of it. That's in part why we offer not only (a) a free 30-day fully functional downloadable trial of the software (no purchase required to download and try it out for 30 days), but (b) a full, no questions asked money back guarantee for the first 30 days after purchase. And you're in that category.
BigOven is as much a community as it is software. We want to make sure that the people who stay with the community and product truly do enjoy using it, and it doesn't sound like you're in that category. BigOven for Windows does a lot of things well -- like letting you tap into 170,000+ recipes with rating, photos and comments from people around the world, easily build up your own recipe collection, create grocery lists by dragging and dropping, learn more about 1,000+ ingredients in the food glossary and more, but nutritional analysis and searching by calculated nutrition admittedly wasn't our #1 priority for the first release of the product, and BigOven is priced accordingly. (If you're looking for powerful nutrition software, you might want to look in a higher price range -- BigOven does offer basic nutrition analysis and calculation, but we'll be the first to admit that there are other more expensive programs that make this their top priority and have a more robust feature set, but without recipe sharing and Internet connectedness that we emphasized with BigOven for Windows.)
To get your full and complete refund within a matter of hours, simply uninstall the product and send an email to support@bigoven.com from the email address you used to purchase. (Note that refunds do void the serial number, which will make your software unusable.) Thanks for trying BigOven, and have a great rest of your weekend!