OK, I will have to investigate the issue.
You should still be able to manually send the correct feed url to Google right?
Are you familiar with working with WordPress filters? If so, you could use the ‘wppfm_upload_dir’ filter to get the correct url to the feed in the feed list. You could use something like:
function corrected_feed_url( $url ) {
return 'put the correct url to the uploads folder here without end slash';
}
add_filter( 'wppfm_upload_dir', 'corrected_feed_url );
After implementing this filter you’ll have to regenerate the feed and than it should have the correct url.