Select the file or directory - then click on the right mouse button
The drop down menu will show chmod (UNIX) - and when you click on that - it shows the read-write-execute settings.
BTW: it's rwx rwx rwx setup so if you normally use the numbers / values e.g. chmod 755 - then you may want to read the bottom of this tutorial page
http://www.ibdhost.com/help/ftp/index.php
addendum: I forgot to mention - to see the permissions use Dirinfo from the menu. Then close the dirinfo - to use refresh - then reopen dirinfo and you'll see your changes.
In other words, you have to refresh then reopen dirinfo to see that the changes have been made.