J-BusinessDirectory - Disable upload of PDFs (etc) as Attachments

I was sure that I saw  a configuration setting within JBDirectory that would  allow me to  restrict the filetypes (PDF, PNG etc) that anyone can upload as attachments but I cannot find it.

Please can you point me to the explicit folder and file in the Joomla directories that I need to modify, or if it's part of the JBD  config, where I need to go to make changes  to limit and remove certain filetype extensions.

 thanks

 Chris

Did you try this:

   - Joomla Admin > Content > Media> Options > Allowed Extensions > delete PDF

This should not allow no pdf to be uploaded to entire Joomla?

   - Screenshot: https://imgur.com/a/EDhG0RL