I had the same issue where it would not rename the file.
I went into SABNZB > Catagories and I created the TV catagory but forgot to fill the in Indexer field.
But now can’t get my files to sort into the episode folders.
I have a folder named TV, then under that are all the show folders, But the downloaded files goto the TV folder and are renamed, but they stay their and are not moved.
Here are some screenshots.
Any help would be appreciated.