Line Ending Not Preserved (CRLF)

I recently upgraded to version 6.6 beta. Since then the line ending is changing from CRLF on my end to LF on the other end. I made no setting changes when upgrading. The transfer mode is still set to binary. I did notice that the server environment end-of-line characters setting was LF so I changed it to CRLF. (I don't know to what this parameter was set before the upgrade.) This did not have any effect.

Thanks for your report. When exactly do the line ending change? When uploading? When saving a file in editor? Internal or external editor? Please provide step-by-step instructions to reproducing the problem.

Prior to the problem occurrence I was uploading a file to a host site via the following script:
This script has worked fine for close to 7 years. After the upgrade, this stopped performing. We played around with the WinSCP user interface settings but that did nothing to solve the problem. We then took a look at the script above and removed the # from the explicit command option transfer binary. This solved the problem.

As I consider things, I'm not sure why things worked correctly in the past. Maybe that was the bug?

Thank you--
--Dean Arnold

Note: the problem did not occur using the user interface (editor?). We could drag and drop files with no change in the end of line characters.

WinSCP defaults to the binary mode.
It's possible that you have re-configured the GUI to use the ascii mode and your script is not isolated form the GUI configuration, so the change to the defauts affected your script too.
See https://winscp.net/eng/docs/scripting#configuration