When I run Limewire, it won't allow me to modify existing MP3's in any way at all. Even mp3's I've had since before I started using Limewire. I never had this problem in v1.4. I'm not sure I understand this last reply to the other person's problem, but I do know that my computer tells me the file may be in use. I cannot rename, delete or move the file at all. Considering I usually organize my files on the fly from windows explorer, this is truly annoying. Waiting until Limewire is done downloading is not a reasonable workaround if you're downloading for hours and have 10 files to reorganize out of over 1000 files. You are bound to forget what you wanted to do after 4 hours if you're anything like me.