Login as admin of your site.Then click on the modules link in your admin panel,you will then see a list of all the modules on you site, search for downloads and in that line click on edit. You then view a screen where you can edit some things of the download module, like the name of the module and Who can View This module. Just change Who can View This? from all visitors to registerd users only, then click save changes. and then you users have to be logged in order to download anything from you site.


I hope you can understand it because i was as clear as i could be.