The WinSCP + EditPlus integration instructions at https://winscp.net/eng/docs/task_edit#mdi have been followed. But, it doesn't work. Every time a file save is attempted, the following error message dialog box appears:
File operation failed.
C:\...\Temp\scp08250\... EC2 path
The system cannot find the path specified.
Open/edit/save one file at a time works.
Any ideas how to solve for multiple files?