Sorry its another "how to download from seedbox" question but I am stumped.

I've tried:

Syncthing - Extremely slow. kb/s on a 300mbps connection.
BTSync - Won't connect through my always on VPN.
CuteFTP Backup function. Maxes out connection but downloads the same files over and over again each time it runs the task.

Local PC to download to is Windows. Is there anyway to achieve what Syncthing and Resilio do but through FTP or similar? I only want it to download files ONCE from Seedbox folder and upload .torrent files to the seedbox torrent folder ONCE as well.