both system with all latest updates.
WinSCP starts fine and works great until I access a local directory with a moderately large number of files (>50), then the program slows to a craw and will ultimately show a "Program Not Responding" for several seconds and at times up a minute. This happens on both machines I use. I even tried to ensure the path is short and using the root of the local drive will cause same sluggishness. The program does eventually come out of it, but it can be several minutes trying to scroll though even a short list of local files.
I have checked past issues, and see something similar was reported and a bug tracker put on it, but nothing appears to have been done since 2011 to solve this problem.