I will try to send a piece file next time I close the program and shut down but for right know I have downloads occurring.
Can't you 'copy' the pieces and 'paste' them into another folder and, from there, zip and send the file for analysis?
As being careful about downloads I scan all downloads before I use them.
If the program allows to configure an 'antivirus' option to scan after the download is finished, use:
C:\Program Files\Alwil Software\Avast4\ashQuick.exe