Please include a more complete copy of the FTP session log, the information you provided for v3 and v4 is identical.
Specifically the lines where the list is performed.
In addition the current release is 4.0 build 1540.
https://oss.azurewebsites.net/download
P.S. do you have the attributes column visible?
File list window > right-click on the file list columns > from the menu make sure attrib is checked.