Access rights of subfulders

Hello,

I am using the latest version (v0.4.1.14.fix04) and I have a question about the access rights.
I want guests to be able to see the root folder, but not subfolders. The subfolders should only be accessabe by users who logged in.
But at this moment I can only block guests from subfolders, by blocking them from the root.

Can this be changed in some way?

Thanks