I use the synchronization as well as auto-remote synchronization a lot.
I don't know if the icons in synchronization dialog changed, but I think in past the upload arrow was in single color and download was in another color. This is not the case at the moment, some binary files make the things a bit harder as you may have green arrows meaninig upload and red arrows meaning upload.
It was easy to glance that all is only uploading, or downloading, now I need to look each differing color of arrow independently this makes things a somewhat slow.
Can I change the icon theme? I like the new icons, just that upload arrow needs to be in single color and download in single color.
P.S. Problems started to appear as I upgraded to WinSCP 5.2.7 RC, from 5.1.x