I can't reproduce the problem because I don't have a test server. The incorrect command was executed on the production server and I had to restore data from backups.
Thanks. Though can you answer all my questions?
Version: 5.16 beta (Build 9865)
Can you reproduce the problem? What version of WinSCP?
Testing the same scenario (assuming SCP protocol), WinSCP executed
rm -f -r " 33082019-A", as expected.
I have created a directory on the server with a leading space in the name. After clicking "delete" the following command was executed:
rm -R /home/www/temporary/ 33082019-A
This caused that all the contents of the parent directory were removed.