Eddy try this file for duplicate categories/files attached
Category level permisions work like this
First checks additional membergroups that a user will have. If any of those return true the permission is allowed.
Then checks the main primary group. If any of those return true the permission is allowed.
Last it checks Post Group if that returns true then it is allowed.
Hmmm...
I don't use additional membergroups, so that doesn't apply....
In Downloads Pro I have "Regular Users" set to allow 2 downloads per day, as it doesn't allow me to set that for "Post groups".
Then I have numerous "Post groups" set depending (obviously) on how many messages have been posted - The first one is "Newbie" for new users that have posted less than 3 messages - Downloads Pro is set to allow them to view the files, but NOT download.
But sadly they CAN download with Downloads Pro v2.0
The previous beta version I used worked perfectly (sorry I cannot remember the version number), and apart from upgrading to SMF v2.0 RC4 and Downloads Pro v2.0, I haven't changed any settings, so I can only assume that the code in Downloads Pro has been changed and it no longer works as it did....
So from what you've said I'm assuming it
should work as follows....
Additional membergroups - Don't exist, so ignore...
Primary membergroup = Regular user - So allow....
Post Group = Newbie - So deny downloads...
But that isn't what's happening

Can you take a look at this please SMF?
Regards
Eddy