StreamFab is exactly what I'm using. You basically need the following release:
StreamFab 6 1 3 4 with Crack
I found it on a private tracker (TL) which I'm certain does not spread viruses. You can look it up on any private tracker of your choice at your own risk. Defender did shout for a trojan but that's not something unexpected.
So I installed this and cracked it. It won't work out of the box thought because it's an older version. Therefore the software's updater service has to be unblocked and it can be safely updated to the latest version which can still be activated using the same crack. After that just log into your OF inside StreamFab, paste in a video URL or a creator's URL and download at will. So far it works perfectly for me, especially since it can scrape profiles.