That resolved the issue - thanks for the quick response and for making such a useful tool!
Before posting, please read how to report bug or request support effectively.
Bug reports without an attached log file are usually useless.
-resumeswitch. You cannot use it for a regular transfer. The switch is intended to resume a previously interrupted transfer only.
There are some data after the end of the payload data : <filename>
open ftpes://site:password@ip -certificate="scrubbed"
get -resume -neweronly /path/to/backups/*.gz
C:\Windows\System32\cmd.exe /c winscp.com /ini=nul /script="c:/path/to/script.txt"