Dont open anymore

Ever since your last update in preparing for IOS7 this App does not open anymore and dont want to delete it and reload since I would loose all my listings.
Can you please have a fix. Mi iPod is 3rd generation and I have IOS 5.1.1 and should still work and more practicle than carrying mu iPad to do groceries...
Thanks
Bob

Schruffy about ShopShop - Shopping List, v4.7.2