Core FTP

In Site Manager, Advanced, Transfers, tick "Use APPE for Resume", which will append to existing (incomplete) files.

Or, View, Options, Transfers, File Exists Dialog, tick Resume.

"C:\Program Files (x86)\CoreFTP\coreftp.exe" -s -O -site <Sitename> -d "/<remote path>/<remote folder>/" -p "C:\<local path>\<local folder>" Program path is from a Windows 7 machine -s runs silent, delete this parameter to see the gui in operation -O overwrites files wi...