Juice renames the files after they're downloaded, looks to me like the program add a hash tag to the file.
Here is the file name during download: EP358_LikeaHawkinItsGyre.mp3.partial
Here is the file name after complete download: EP358_LikeaHawkinItsGyre_d13a76d516d9dec20c3d276ce028ed5089ab1ce3dae902ea1d01cc8234d2cd5f655f_c_id_4840714.mp3
Removing the extra characters is really a pain when you have a large number of files.
Using Juice 2.22 Portable on Windows XP SP3
Adding the "%n" in Advanced Options doesn't fix or change the file name.