Try updating the theme files to the WooCommerce update which was 1.9 (its also the latest version available). You can do so by re-downloading the theme files from Themeforest under your downloads and then installing just like you did the first time.
If you made any changes to the actual theme files you will need to back them up.
If you used "duplicate item" from WooCommerce to duplicate products, you may need to go into each product and remove the image if its showing as attached. Or go into your wordpress Media manager and find that image and detach it from all pages/posts.