Due to some security issues, the JDownloader app is currently incompatible with FileFactory. We do not know if we will enable access to this app again in the future.
What are the issues?
JDownloader is an open-source app, and its source code is available for anyone to inspect
JDownloader is not able to effectively obscure our API key, so third parties or bots can abuse our API
JDownloader allows free users to bypass our website and create automated downloads which leech our bandwidth, creating a heavy load on our systems and slowing down speeds for our valued Premium users
In the meantime, try Internet Download Manager if you're looking for a great download manager.