When I bought a new computer and transferred Amazon mp3 files from the old one to the new, it looks like many, but not all, of those songs now end with a .ptl extension and iTunes cannot play them. Files end with .mp3.ptl, that is. I found that if I renamed those files to have a .mp3 extension by deleting the .ptl extension, iItunes was able to play them.
Is there a way to rename all the files I have that now have the .ptl extention? And by the way, what does .ptl mean? All I can find through Google searches is Path Too Long.