Problem solved. My existing version was so old it did not have an export config function. I updated the version on the old computer, then I was able to export. I then imported it - flawless.

Thansk!

Please read documentation:
https://winscp.net/eng/docs/config#transfer

If that does not help, come back.

Old computer using 4.3.5 Build 1463. How can I transfer all of these to a new computer (using the current 5.7.3 version)? Or - how do I unhide the passwords on these stored sessions so I can manually recreate them?

Thanks