List index out of bounds (6)

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 5.5

Error message:
List index out of bounds (6)

Running WinSCP 5.5 on Ubuntu 12.04 Not a big deal.

Thanks for your report.
Are you getting this on Preferences dialog?