Just note: The UTF-8 encoding for filenames has to be Off. Auto works too in this case as WinSCP correctly detects that the server does not support UTF-8.
Before posting, please read how to report bug or request support effectively.
Bug reports without an attached log file are usually useless.
No problem at all.
For how long do you need the access and what is e-mail address to send access details?
Thanks for your report.
Any chance of getting a test account on your server?