I recently got a new computer on which I installed iTunes, but had never hooked up my iPhone to it until today. This morning I right clicked on the left pane and backed-up my iPhone in iTunes because I was going to the store today to get my phone exchanged. When I backed up the phone I did not sync or transfer my 'apps' between the phone and the computer or anything. I assumed it would be done automatically as part of the backup process. But after I came back from the store and restored my phone from the 'backup' I created this morning, only my contacts, calendar, bookmarks and pictures were installed on my new phone. It did not install any apps. When I tried to sync the apps it gave me a warning that said the phone can be synced to only one iTunes library at a time and that it will erase all existing data or something. I unplugged my phone at that time because I wasn't sure if it would erase my contacts, bookmarks and pictures. I still have about 6 backup folders from my original iPhone 4 phone (the one I returned today) that was on my old computer on an external hard drive that goes back a few months. Will copying the latest backup folder from there to my new computer and trying to restore the phone to that previous back up solve the missing apps issue I have? I really don't want to reinstall all the apps manually. Also what is the preferred method to transfer apps installed directly on the phone to iTunes so that I don't run into this problem again?