So sorry for missing your posts! @patreiche:
You're not supposed to get charged for re-downloading any premium file that you've downloaded before. Kindly write to us at support[at]brillkids[dot]com with the names of the specific files you ended up "paying" again so we can correct those errors for you.
At the moment the files in the Library are filed by subject/topic and by language - for example, a Spanish "Shapes" file will be filed under Art, Shapes+Colors, and under Spanish. The Library also has dedicated sections for Little Reader, Little Math and Little Musician files. In case it helps, there is a blue "Hide Downloaded" button at the top of each Library section's page - just click on it so you'll only see the ones you haven't downloaded.@NPLight:
If you were clicking on the "Add a download" link from your "My Profile" box (at the upper left part of the Forum page), please don't use that one. Instead, do go to the Library and click on the green "Add Download" button found on any section's page: http://library.brillkids.com/category.php?cid=1&type=1