Interface: Explorer style
Transfer: SFTP with SCP fallback
OS: Windows 2000 Professional
I installed version 3.7.3 on computer that has never seen WinSCP before. When I opened the Synchronize Dialog, an error message was shown. I don't remember the exact message, but it was something like:
Unable to load ???->???: Invalid Property Value
I then installed version 3.7.2, opened the Synchronize Dialog and successfully started a synchronization.
When I reinstalled 3.7.3 afterwards, the Synchronize Dialog opened there as well.