I have iTunes (latest version) running on Windows XP and a 16Gb 1st gen' iPod Touch (iOS V3.1.3). All was well until a month or two ago when, one day, I opened iTunes to discover it was empty - no music library, videos, apps etc. It was as if it was a fresh install. So, all my files are on my Touch but I've avoided connecting it to iTunes for fear all my files will disappear.
I can't put it off much longer so my question is, what do I have to do in iTunes so it restores its libraries from the files on my iPod Touch (without messing with the files on my Touch)?