On one of the sites I manage, I had over 100 posts, each with a download.
The sync feature of this plugin made changing over a breeze. I just re-uploaded all the content to the filebase categories and synced it.
After that, I used the Find Replace plugin to change the file paths on each of the posts where the old download links were.
Worked like a charm! I don't know of any other download manager that would have allowed for such efficient and flexible importing of large amounts of data!