The only way I've been able to do it (forget the proxy that uploaded.to want you to put in), is to enable both Direct Downloads and FileFactory TrafficShare options in the Filefactory Download Settings. Go to the Remote Upload page on Uploaded.to, and forget about entering any information in the 'Domain Profiles', in fact if you've already entered any details for Filefactory, delete it. Then just enter the link of the file you want to download from Filefactory, and make sure you put in the details of your Filefactory premium account i.e. http://username: password@filefactory.com/filename. Press the 'request' button, you'll get one of two things happen, it'll either come back with some sort of error (in which case just do the same again, it will work), or you'll get the name of the download in the 'Status' box, along with the 'pending' message. It might eventually fail, in which case check your files and folder screen, because I've found even it says it's failed it hasn't, or you'll end up with the 'success' message.
Be advised though, that Filefactory have changed their Traffic Share amount very recently. It used to be 100 GB a day, it's now been changed to 100 GB a MONTH.
Be advised though, that Filefactory have changed their Traffic Share amount very recently. It used to be 100 GB a day, it's now been changed to 100 GB a MONTH.