From the other thread:
See Freso’s post above as well.
Since you just got a whole new dump of music, this is a good time to step out of your comfort zone and try some different applications. You can always swap back to iTunes if you don’t find anything good!
iTunes is the only program that semi-regularly promps threads like this one…
Another good option would be to take the first piece of advice you were given, and work on a copy of your music, so that you don’t have to worry about this at all while you’re editing things.