I have a 4th-generation iPod Touch. It is not jailbroken and has never been jailbroken. Tonight I plugged it into my PC, and iTunes said the 4.3.5 update was available. So I let it update my iPod Touch. After my iPod Touch was updated, iTunes restored the backup. But I noticed that all my downloaded apps were gone.. My apps are all shown in iTunes. So, I tried to copy them back to my iPod Touch by dragging & dropping them - But it won't let me! This is a bit frustrating.. I've never lost my apps by a firmware update before, and I don't know why iTunes won't let me copy them back to my iPod Touch. What can I do to easily get my apps back on there? I don't want to download them all again.