I am having a problem with this also...
Using the file uploader...
the form is located in an admin area mysite.com/admin/form.php
startup_folder:'images' <-- files exists in directory when uploaded, but not shown in file manager (but sometimes on the form itself?)
startup_folder:'pdf' <-- works pdfs download as expected.
the uploads file is located in at mysite.com/uploads
I am trying to use the default dir mysite.com/uploads/images
this directory is fine mysite.com/uploads/pdfs
$kfm_userfiles_address = '../../uploads/';
$kfm_userfiles_output = '/uploads/';
Using this, PDF uploads are fine, but image uploads are not. The images are not visible within the kfm filemanager.