Hide Upload Folder option on the frontend

Hello.
First of all, congratulations on your excellent plugin. It's amazing what it can do.
Before purchasing the full version with all the add-ons, I'd like to find out if it's possible to hide the upload option for a folder with content. I just need collaborators who upload files to be able to upload only files, not folders. Folders can only be created and uploaded by the system administrator. We'd like the subscriber relay to only see the option to upload files. Is this possible?
I look forward to your response.
Thank you for your help.