I don't know what has changed, but I'll bet it was something organisational at Stairways. Interarchy (version 7) is now once again fantastic product, and working with the staff at Stairways is once again a pleasure.

I've tried every SFTP client on the market capable of preserving modification times on SFTP transfer, and only found two that were stable enough for daily use, Vicomsoft FTP Client and Interarchy. Of the two, I much prefer Interarchy's GUI. For me, the one remaining feature would make Interarchy the *perfect* SFTP client -- smart mirrors, a la FTPeel's MagicMirror.