Can someone help me? I'm a Windows Vista user with the 4.18.8 Basic version. And the problem is that everytime I download a song then close the program the next time I use it to download again the song I downloaded earlier is compressed to a zip file that I cannot use. Someone please have an answer. Thank you to all who reply.

That's spam. See Virus thread: Typical virus spam file sizes - Make a note of them (click on blue link to see)