No specific info about version 3.1. Please visit the main page of Favorite FTP on Mac Informer.
FTP + SFTP + FTPS file transfer client which focuses on speed...
Simple, user-friendly yet powerful FTP client for Mac.
Powerful FTP/S + SFTP + WebDAV/S file transfer app.
Transfer files using various connection protocols.
Upload files to remote servers using the power of the Captain FTP engine.