A lot of things! WinSCP 5.5 is a major application update bringing fresh look and improved user experience!
In particular there is enhanced:
- Improved and simplified user interface
- One-click session import from a URL (useful, e.g., for hosting companies)
- Transfer Options and Settings
- Queue processing
- Sites and Workspaces (incl. Sites import from Filezilla)
- Integration with alternative SSH clients (such as KiTTY)
- Scripting and .NET
- Master password
- Working in large font / high DPI environments
As usual, you can obtain WinSCP 5.5 from the official WinSCP download page.