I have a in iPhone 3G running the last available iOS (4.2.1). With out a doubt, my favorite app is the Amazon Kindle app. I read books on it constantly. I also started using it to manage PDFs, by emailing songs to my kindle account. Unfortunately, the last time I did that, the app crashed while downloading the PDF. Now, every time I open the app, it tries to finish downloading the PDF, and crashes. Things I've already tried: went to my amazon account and deleted the offending pdf restored my iPhone from my backup I would delete the app and download it again, but the App Store no longer has a version that is compatible with my phone. If I delete it on the phone, then sync the phone, will it reinstall the app, and maybe work?